diff --git a/backend/emm-sale/src/docs/asciidoc/index.adoc b/backend/emm-sale/src/docs/asciidoc/index.adoc
index d6d7cf96f..bfbc83f39 100644
--- a/backend/emm-sale/src/docs/asciidoc/index.adoc
+++ b/backend/emm-sale/src/docs/asciidoc/index.adoc
@@ -138,6 +138,9 @@ include::{snippets}/participate-event/http-response.adoc[]
 .HTTP request
 include::{snippets}/participate-event-cancel/http-request.adoc[]
 
+.HTTP request 설명
+include::{snippets}/participate-event-cancel/request-parameters.adoc[]
+
 .HTTP response
 include::{snippets}/participate-event-cancel/http-response.adoc[]
 
diff --git a/backend/emm-sale/src/main/java/com/emmsale/event/api/EventApi.java b/backend/emm-sale/src/main/java/com/emmsale/event/api/EventApi.java
index f345bb04a..f36c06c38 100644
--- a/backend/emm-sale/src/main/java/com/emmsale/event/api/EventApi.java
+++ b/backend/emm-sale/src/main/java/com/emmsale/event/api/EventApi.java
@@ -56,10 +56,10 @@ public ResponseEntity<Void> participateEvent(
   @DeleteMapping("/{eventId}/participants")
   public ResponseEntity<String> cancelParticipateEvent(
       @PathVariable final Long eventId,
-      @RequestBody final EventParticipateRequest request,
+      @RequestParam(name = "member-id") final Long memberId,
       final Member member
   ) {
-    eventService.cancelParticipate(eventId, request.getMemberId(), member);
+    eventService.cancelParticipate(eventId, memberId, member);
 
     return ResponseEntity.noContent().build();
   }
diff --git a/backend/emm-sale/src/main/resources/http/event.http b/backend/emm-sale/src/main/resources/http/event.http
index 25509f4b6..817d743af 100644
--- a/backend/emm-sale/src/main/resources/http/event.http
+++ b/backend/emm-sale/src/main/resources/http/event.http
@@ -36,14 +36,10 @@ Authorization: bearer eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxIiwiaWF0IjoxNjkwMTk2OTY5L
 }
 
 ### Event 참여자 목록에서 멤버 삭제
-DELETE http://localhost:8080/events/1/participants
+DELETE http://localhost:8080/events/1/participants?member-id=1
 Content-Type: application/json
 Authorization: bearer eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxIiwiaWF0IjoxNjkwMTk2OTY5LCJleHAiOjE2OTM3OTY5Njl9.yahaEBvKBA7xelNuykx8TROhemnzJAsu1Sv5rrSfCM0
 
-{
-  "memberId": 1
-}
-
 ### 행사 참여자 목록 조회
 GET http://localhost:8080/events/1/participants
 
diff --git a/backend/emm-sale/src/test/java/com/emmsale/event/api/EventApiTest.java b/backend/emm-sale/src/test/java/com/emmsale/event/api/EventApiTest.java
index 0f580c32d..719bf8b38 100644
--- a/backend/emm-sale/src/test/java/com/emmsale/event/api/EventApiTest.java
+++ b/backend/emm-sale/src/test/java/com/emmsale/event/api/EventApiTest.java
@@ -127,17 +127,17 @@ void cancelParticipateEvent() throws Exception {
     final EventParticipateRequest request = new EventParticipateRequest(memberId);
     final String fakeAccessToken = "Bearer accessToken";
 
-    final RequestFieldsSnippet requestFields = requestFields(
-        fieldWithPath("memberId").type(JsonFieldType.NUMBER).description("멤버 식별자")
+    final RequestParametersSnippet requestParameters = requestParameters(
+        parameterWithName("member-id").description("멤버 식별자")
     );
 
     //when
-    mockMvc.perform(delete(format("/events/%s/participants", eventId))
+    mockMvc.perform(delete(format("/events/%s/participants?member-id=%s", eventId, memberId))
             .header("Authorization", fakeAccessToken)
             .contentType(MediaType.APPLICATION_JSON)
             .content(objectMapper.writeValueAsString(request)))
         .andExpect(status().isNoContent())
-        .andDo(document("participate-event-cancel", requestFields));
+        .andDo(document("participate-event-cancel", requestParameters));
   }
 
   @Test
@@ -463,6 +463,7 @@ void isAlreadyParticipate() throws Exception {
             get("/events/{eventId}/participants/already-participate?member-id={memberId}"
                 , eventId, memberId)
         )
+        .andExpect(status().isOk())
         .andDo(document("check-already-participate"));
   }
 }