diff --git a/UmaUmaChecker/CombineImage.cpp b/UmaUmaChecker/CombineImage.cpp
index 045a6ea..4ba8ed1 100644
--- a/UmaUmaChecker/CombineImage.cpp
+++ b/UmaUmaChecker/CombineImage.cpp
@@ -56,6 +56,7 @@ void CombineImage::StartCapture()
 	Images.clear();
 	DetectedYLines.clear();
 	BarLength = 0;
+	Error = L"";
 
 	LOG_DEBUG << L"[CombineImage::StartCapture] ウマ娘詳細結合開始";
 
@@ -131,10 +132,11 @@ bool CombineImage::Combine()
 	return false;
 }
 
-void CombineImage::_EndCapture()
+void CombineImage::_EndCapture(const std::wstring& error)
 {
 	if (!IsCapture) return;
 
+	Error = error;
 	IsCapture = false;
 	status = Stop;
 }
@@ -158,9 +160,9 @@ void CombineImage::Capture()
 
 	if (BarLength == 0 && scroll.GetBarLength() > 0) BarLength = scroll.GetBarLength();
 
-	if (!IsScanStarted && scroll.GetBarLength() == 0) {
+	if (!IsScanStarted && (!scroll.IsValid() || scroll.GetBarLength() == 0)) {
 		LOG_DEBUG << L"[CombineImage::Capture] 停止, !IsScanStarted && scroll.GetBarLength() == 0";
-		_EndCapture();
+		_EndCapture(L"スクロールバーを検出できませんでした。");
 		// 通常キャプチャ
 		delete image;
 		return;
@@ -173,18 +175,17 @@ void CombineImage::Capture()
 		status = WaitForMovingScrollbarOnTop;
 	}
 
-	if (BarLength > 0 && std::abs(BarLength - scroll.GetBarLength()) > 1) {
-		if (IsManualStop) {
-			LOG_DEBUG << L"[CombineImage::Capture] 停止, BarLength > 0 && std::abs(BarLength - scroll.GetBarLength()) > 1) && IsManualStop";
-			_EndCapture();
-		}
+	if (!PrevImage.empty() && (PrevImage.size().width != mat.size().width || PrevImage.size().height != mat.size().height)) {
+		LOG_DEBUG << L"[CombineImage::Capture] 停止, !PrevImage.empty() && (PrevImage.size().width != mat.size().width || PrevImage.size().height != mat.size().height)";
+		_EndCapture(L"ウィンドウサイズが変更されました。");
 		delete image;
 		return;
 	}
-
-	if (!PrevImage.empty() && (PrevImage.size().width != mat.size().width || PrevImage.size().height != mat.size().height)) {
-		LOG_DEBUG << L"[CombineImage::Capture] 停止, !PrevImage.empty() && (PrevImage.size().width != mat.size().width || PrevImage.size().height != mat.size().height)";
-		_EndCapture();
+	else if (BarLength > 0 && std::abs(BarLength - scroll.GetBarLength()) > 1) {
+		if (IsManualStop) {
+			LOG_DEBUG << L"[CombineImage::Capture] 停止, BarLength > 0 && std::abs(BarLength - scroll.GetBarLength()) > 1) && IsManualStop";
+			_EndCapture(L"スクロールバーの大きさが変わっています。");
+		}
 		delete image;
 		return;
 	}
@@ -250,6 +251,7 @@ void CombineImage::Capture()
 					DetectedYLines.emplace_back(0, y);
 					IsFirstScan = false;
 					CurrentScrollPos = scroll.GetPos();
+					PrevImage = mat.clone();
 				}
 			}
 		}
diff --git a/UmaUmaChecker/CombineImage.h b/UmaUmaChecker/CombineImage.h
index d567c89..cd6d3ae 100644
--- a/UmaUmaChecker/CombineImage.h
+++ b/UmaUmaChecker/CombineImage.h
@@ -2,6 +2,7 @@
 
 #include <vector>
 #include <opencv2/opencv.hpp>
+#include <string>
 
 struct CombineImageInfo {
 	int StartY;
@@ -29,6 +30,7 @@ class CombineImage
 	int GetProgressTime() const { return msec; }
 	CombineStatus GetStatus() const { return status; }
 	bool IsImageSaved() const { return IsSavedImage; }
+	std::wstring GetError() const { return Error; }
 
 	bool IsCapturing() const { return IsCapture; }
 	void StartCapture();
@@ -37,7 +39,7 @@ class CombineImage
 	bool Combine();
 
 private:
-	void _EndCapture();
+	void _EndCapture(const std::wstring& error = L"");
 	void Capture();
 
 	int GetTemplateImage(const cv::Mat& mat, cv::Mat& cut);
@@ -61,6 +63,8 @@ class CombineImage
 	bool IsManualStop;
 	bool IsSavedImage;
 
+	std::wstring Error;
+
 	std::vector<CombineImageInfo> DetectedYLines;
 	std::vector<cv::Mat> Images;
 
diff --git a/UmaUmaChecker/MainFrame.cpp b/UmaUmaChecker/MainFrame.cpp
index 2600d71..3ab6c3b 100644
--- a/UmaUmaChecker/MainFrame.cpp
+++ b/UmaUmaChecker/MainFrame.cpp
@@ -131,11 +131,6 @@ MainFrame::MainFrame(wxWindow* parent, const wxPoint& pos, const wxSize& size, l
 
 	m_comboPopup = new wxComboBoxPopup(this);
 
-	this->SetSizer(bSizerTop);
-	this->Fit();
-	this->Layout();
-	this->Centre(wxBOTH);
-
 	// イベントバインド
 	this->Bind(wxEVT_CLOSE_WINDOW, &MainFrame::OnClose, this);
 	m_toggleBtnStart->Bind(wxEVT_COMMAND_TOGGLEBUTTON_CLICKED, &MainFrame::OnClickStart, this);
@@ -167,6 +162,10 @@ MainFrame::MainFrame(wxWindow* parent, const wxPoint& pos, const wxSize& size, l
 	if (!config->IsShowStatusBar) m_statusBar->Hide();
 	else timer.Start(1000);
 
+	this->SetSizer(bSizerTop);
+	this->Fit();
+	this->Layout();
+
 	Init();
 }
 
@@ -343,7 +342,9 @@ void MainFrame::OnClickCombine(wxCommandEvent& event)
 		CombineTimer.Stop();
 		this->SetTitle(app_title);
 		if (!combine.IsImageSaved()) {
-			wxMessageBox(wxT("キャプチャに失敗しました。"), app_title, wxICON_ERROR);
+			std::wstring error = combine.GetError();
+			if (!error.empty()) wxMessageBox(error, app_title, wxICON_ERROR);
+			else wxMessageBox(wxT("キャプチャに失敗しました。"), app_title, wxICON_ERROR);
 		}
 	}
 }
diff --git a/UmaUmaChecker/Point.h b/UmaUmaChecker/Point.h
new file mode 100644
index 0000000..30b74b7
--- /dev/null
+++ b/UmaUmaChecker/Point.h
@@ -0,0 +1,19 @@
+#pragma once
+
+template<typename T>
+class Point
+{
+public:
+	Point() {}
+	Point(T x, T y) : x_(x), y_(y) {}
+
+	T x() const { return x_; }
+	T y() const { return y_; }
+
+	void x(const T& x) { x_ = x; }
+	void y(const T& y) { y_ = y; }
+
+private:
+	T x_, y_;
+};
+
diff --git a/UmaUmaChecker/ScrollbarDetector.cpp b/UmaUmaChecker/ScrollbarDetector.cpp
index c661683..58c148e 100644
--- a/UmaUmaChecker/ScrollbarDetector.cpp
+++ b/UmaUmaChecker/ScrollbarDetector.cpp
@@ -1,10 +1,14 @@
 #include "ScrollbarDetector.h"
 
+#include <mutex>
 
 #include <opencv2/opencv.hpp>
 
 
-ScrollbarDetector::ScrollbarDetector(cv::Mat& img)
+Point<double> ScrollbarDetector::Start(0.967, 0.08);
+Point<double> ScrollbarDetector::End(0.967, 1.0 - 0.08);
+
+ScrollbarDetector::ScrollbarDetector(cv::Mat& img) : valid(false)
 {
 	InitScrollInfo(img);
 }
@@ -13,73 +17,124 @@ ScrollbarDetector::~ScrollbarDetector()
 {
 }
 
+bool ScrollbarDetector::IsValid() const
+{
+	return valid;
+}
+
 int ScrollbarDetector::GetPos() const
 {
-	return StartY;
+	return valid ? ScrollBarStartY : 0;
 }
 
 int ScrollbarDetector::GetTotalLength() const
 {
-	return TotalLength;
+	return valid ? TotalLength : 0;
 }
 
 int ScrollbarDetector::GetBarLength() const
 {
-	return Length;
+	return valid ? Length : 0;
 }
 
 int ScrollbarDetector::GetBarLengthRatio() const
 {
-	return (double)Length / TotalLength * 100;
+	return valid ? (double)Length / TotalLength * 100 : 0;
 }
 
 bool ScrollbarDetector::IsBegin() const
 {
-	return StartY == 0;
+	return valid && ScrollBarStartY == MinY;
 }
 
 bool ScrollbarDetector::IsEnd() const
 {
-	return EndY + 1 == TotalLength;
+	return valid && ScrollBarEndY == MaxY;
 }
 
 void ScrollbarDetector::InitScrollInfo(cv::Mat& img)
 {
-	TotalLength = img.size().height;
+	TotalLength = 0;
 	Length = 0;
 
-	StartY = EndY = -1;
+	ScrollBarStartY = ScrollBarEndY = -1;
 
-	cv::Mat scr;
-	cv::inRange(img, cv::Scalar(140, 121, 123), cv::Scalar(180, 179, 189), scr);
+	cv::Mat bar, scr;
+	cv::inRange(img, cv::Scalar(140, 121, 123), cv::Scalar(180, 179, 189), bar);
+	cv::inRange(img, cv::Scalar(140, 121, 123), cv::Scalar(217, 210, 211), scr);
 
+	MinY = -1;
+	MaxY = -1;
 	for (int y = 0; y < scr.size().height; y++) {
-		cv::uint8_t c = scr.at<cv::uint8_t>(y, 2);
-		if (c == 255 && StartY == -1) {
-			/*
-			bool hasBlack = false;
-			for (int x = 0; x < scr.size().width; x++) {
-				cv::uint8_t bw = scr.at<cv::uint8_t>(y, x);
-				if (bw == 0) {
-					hasBlack = true;
-					break;
-				}
+		for (int x = 0; x < scr.size().width; x++) {
+			cv::uint8_t b = scr.at<cv::uint8_t>(y, x);
+			if (b == 255) {
+				if (MinY == -1) MinY = y;
+				if (y > MaxY) MaxY = y;
 			}
+		}
+	}
+
+	if (MinY == -1 || MaxY == -1) return;
+
+	TotalLength = MaxY - MinY;
+
+	for (int y = MinY; y <= MaxY; y++) {
+		cv::uint8_t c = 0;
 
-			if (!hasBlack) */
-			StartY = y;
+		for (int x = 0; x < bar.size().width && c != 255; x++) c = bar.at<cv::uint8_t>(y, x);
+
+		if (c == 255 && ScrollBarStartY == -1) {
+			ScrollBarStartY = y;
 		}
-		else if (c == 0 && StartY != -1 && EndY == -1) {
-			EndY = y - 1;
+		else if (c == 0 && ScrollBarStartY != -1 && ScrollBarEndY == -1) {
+			ScrollBarEndY = y - 1;
 			break;
 		}
 	}
 
-	if (StartY == -1 && EndY == -1) {
+	if (ScrollBarStartY == -1 && ScrollBarEndY == -1) {
 		return;
 	}
 
-	if (EndY == -1) EndY = scr.size().height - 1;
+	if (ScrollBarEndY == -1) ScrollBarEndY = MaxY;
+
+	Length = ScrollBarEndY - ScrollBarStartY;
+	valid = true;
+}
+
+std::list<Point<int>> ScrollbarDetector::GetMargin(cv::Mat& img)
+{
+	auto start = Point<int>(img.size().width * Start.x(), img.size().height * Start.y());
+	auto end = Point<int>(img.size().width * End.x(), img.size().height * End.y());
+
+	cv::Mat scr;
+	cv::inRange(img, cv::Scalar(140, 121, 123), cv::Scalar(217, 210, 211), scr);
+
+	cv::Mat test;
+	cv::inRange(img, cv::Scalar(170, 151, 153), cv::Scalar(255, 255, 255), scr);
+	cv::inRange(img, cv::Scalar(170, 151, 153), cv::Scalar(255, 255, 255), scr);
+
+	std::once_flag once_start;
+	Point<int> pos_start;
+	Point<int> pos_end;
+
+	for (int y = start.y(); y < end.y(); y++) {
+		auto c = scr.at<cv::uint8_t>(y, start.x());
+		if (c == 255) {
+			std::call_once(once_start, [&] {
+				pos_start.x(start.x());
+				pos_start.y(y);
+				});
+			pos_end.x(start.x());
+			pos_end.y(y);
+		}
+		else
+			break;
+	}
 
-	Length = EndY - StartY;
+	return {
+		pos_start,
+		pos_end
+	};
 }
diff --git a/UmaUmaChecker/ScrollbarDetector.h b/UmaUmaChecker/ScrollbarDetector.h
index 636a760..1842295 100644
--- a/UmaUmaChecker/ScrollbarDetector.h
+++ b/UmaUmaChecker/ScrollbarDetector.h
@@ -1,5 +1,9 @@
 #pragma once
 
+#include <list>
+
+#include "Point.h"
+
 namespace cv {
 	class Mat;
 }
@@ -10,6 +14,7 @@ class ScrollbarDetector
 	ScrollbarDetector(cv::Mat& img);
 	~ScrollbarDetector();
 
+	bool IsValid() const;
 	int GetPos() const;
 	int GetTotalLength() const;
 	int GetBarLength() const;
@@ -20,10 +25,22 @@ class ScrollbarDetector
 private:
 	void InitScrollInfo(cv::Mat& img);
 
+	std::list<Point<int>> GetMargin(cv::Mat& img);
+	
+private:
+	static Point<double> Start;
+	static Point<double> End;
+
 private:
+	bool valid;
+
 	int TotalLength;
 	int Length;
-	int StartY;
-	int EndY;
+
+	int ScrollBarStartY;
+	int ScrollBarEndY;
+
+	int MinY;
+	int MaxY;
 };
 
diff --git a/UmaUmaChecker/UmaUmaChecker.vcxproj b/UmaUmaChecker/UmaUmaChecker.vcxproj
index 2f479bf..f7aed32 100644
--- a/UmaUmaChecker/UmaUmaChecker.vcxproj
+++ b/UmaUmaChecker/UmaUmaChecker.vcxproj
@@ -273,6 +273,7 @@
     <ClInclude Include="GrandLiveMusicListFrame.h" />
     <ClInclude Include="Log.h" />
     <ClInclude Include="object_pool.hpp" />
+    <ClInclude Include="Point.h" />
     <ClInclude Include="ScenarioData.h" />
     <ClInclude Include="ScrollbarDetector.h" />
     <ClInclude Include="Tesseract.h" />
diff --git a/UmaUmaChecker/UmaUmaChecker.vcxproj.filters b/UmaUmaChecker/UmaUmaChecker.vcxproj.filters
index c477dc4..13d0203 100644
--- a/UmaUmaChecker/UmaUmaChecker.vcxproj.filters
+++ b/UmaUmaChecker/UmaUmaChecker.vcxproj.filters
@@ -227,6 +227,9 @@
     <ClInclude Include="DebugImageCombineFrame.h">
       <Filter>ヘッダー ファイル</Filter>
     </ClInclude>
+    <ClInclude Include="Point.h">
+      <Filter>ヘッダー ファイル</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="UmaUmaChecker.rc">