diff --git a/src/pages/dashboard/timeline/Timeline.tsx b/src/pages/dashboard/timeline/Timeline.tsx
index d015d9fa..78d632af 100644
--- a/src/pages/dashboard/timeline/Timeline.tsx
+++ b/src/pages/dashboard/timeline/Timeline.tsx
@@ -96,7 +96,7 @@ export default function Timeline() {
       startDate: editDetail.startDate,
       endDate: editDetail.endDate,
       metrics: editDetail.metrics,
-      comparisonPeriodType: "LAST_WEEK" as const,
+      comparisonPeriodType: editDetail.comparisonPeriodType,
     };
   }, [editDetail]);
 
diff --git a/src/types/timeline/api.ts b/src/types/timeline/api.ts
index d431174b..3c63e5a5 100644
--- a/src/types/timeline/api.ts
+++ b/src/types/timeline/api.ts
@@ -59,6 +59,7 @@ export interface ITimelineDetail {
   endDate: string;
   performanceStatus: TTimelinePerformanceStatus;
   metrics: TTimelineMetric[];
+  comparisonPeriodType: TTimelineComparisonPeriodType;
   summary: string;
   dailyTrend: ITimelineDailyTrend[];
   platformContributions: ITimelinePlatformContribution[];
diff --git a/src/types/timeline/timeline.mock.ts b/src/types/timeline/timeline.mock.ts
index c5b11c67..661bec69 100644
--- a/src/types/timeline/timeline.mock.ts
+++ b/src/types/timeline/timeline.mock.ts
@@ -61,6 +61,7 @@ export const TIMELINE_DETAIL_MOCK: ITimelineDetail = {
   endDate: "2026-06-30",
   performanceStatus: "ON_TRACK",
   metrics: ["CLICK", "CONVERSION", "ROAS"],
+  comparisonPeriodType: "LAST_WEEK",
   summary:
     "해당 기간 동안 클릭수는 전반적으로 증가하며 평균 이상의 성과를 보였습니다. 특히 6월 23일에 가장 높은 클릭수를 기록했으며, 이후에도 높은 수준을 유지했습니다. 다만 전환수는 후반부로 갈수록 소폭 감소하는 흐름을 보였습니다.",
   dailyTrend: [