diff --git a/lib/review/satysfibuilder.rb b/lib/review/satysfibuilder.rb
new file mode 100644
index 000000000..ec231a992
--- /dev/null
+++ b/lib/review/satysfibuilder.rb
@@ -0,0 +1,142 @@
+# satysfibuilder.rb
+#
+# Copyright (c) 2018 Kenshi Muto
+#
+# This program is free software.
+# You can distribute or modify this program under the terms of
+# the GNU LGPL, Lesser General Public License version 2.1.
+#
+
+require 'review/builder'
+
+module ReVIEW
+  class SATYSFIBuilder < Builder
+    HEADLINE = {
+      1 => 'chapter',
+      2 => 'section',
+      3 => 'subsection'
+    }.freeze
+
+    def pre_paragraph
+      '+p{'
+    end
+
+    def post_paragraph
+      '}'
+    end
+
+    def extname
+      '.saty'
+    end
+
+    def builder_init_file
+      @section = 0
+      @subsection = 0
+
+      @indent = '  '
+    end
+    private :builder_init_file
+
+    def escape(str)
+      str.gsub('\\', '\\\\\\').
+        gsub(';', '\\;').
+        gsub('<', '\\<').
+        gsub('>', '\\>').
+        gsub('{', '\\{').
+        gsub('}', '\\}')
+    end
+
+    def unescape(str)
+      str.gsub('\\;', ';').
+        gsub('\\<', '<').
+        gsub('\\>', '>').
+        gsub('\\{', '{').
+        gsub('\\}', '}').
+        gsub('\\\\\\', '\\')
+    end
+
+    def headline(level, _label, caption)
+      case level
+      when 2
+        puts '      >' if @subsection > 0
+        puts '    >' if @section > 0
+        @section += 1
+        @subsection = 0
+      when 3
+        puts '      >' if @subsection > 0
+        @subsection += 1
+      end
+
+      headline_name = HEADLINE[level]
+      @indent = level
+      puts %Q(#{indents}+#{headline_name}{#{compile_inline(caption)}}<)
+      @indent += 1
+    end
+
+    def result
+      s = ''
+      if @subsection > 0
+        @indent -= 1
+        s += "#{indents}>\n"
+      end
+      if @section > 0
+        @indent -= 1
+        s += "#{indents}>\n"
+      end
+      @indent -= 1
+      s += "#{indents}>\n" # chapter
+      @output.string + s
+    end
+
+    def paragraph(lines)
+      puts "#{indents}#{pre_paragraph}"
+      @indent += 1
+      lines.each do |line|
+        puts "#{indents}#{line}"
+      end
+      @indent -= 1
+      puts "#{indents}#{post_paragraph}"
+    end
+
+    def inline_b(s)
+      "\\emph{#{escape(s)}}"
+    end
+
+    def inline_tt(s)
+      # needs local.satyh
+      "\\file{#{escape(s)}}"
+    end
+    alias_method :inline_code, :inline_tt
+
+    def footnote(_id, _str)
+      # handle by inline_fn
+    end
+
+    def inline_fn(id)
+      %Q(\\footnote{#{compile_inline(@chapter.footnote(id).content.strip)}})
+    end
+
+    def inline_img(id)
+      _chapter, id = extract_chapter_id(id)
+      %Q(\\ref(\`fig:#{escape(id)}\`);)
+    end
+
+    def image_image(id, caption, metric)
+      puts <<EOT
+#{indents}+p{
+#{indents}  \\figure ?:(`fig:#{escape(id)}`){#{compile_inline(caption)}}<
+#{indents}    +image-frame{\\insert-image(#{metric})(`#{@chapter.image(id).path}`);}
+#{indents}  >
+#{indents}}
+EOT
+    end
+
+    def indents
+      '  ' * @indent
+    end
+
+    def nofunc_text(str)
+      escape(str)
+    end
+  end
+end