diff --git a/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/application/dto/response/TimelineResponse.java b/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/application/dto/response/TimelineResponse.java
index 5608bbdd..b5d64721 100644
--- a/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/application/dto/response/TimelineResponse.java
+++ b/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/application/dto/response/TimelineResponse.java
@@ -2,6 +2,7 @@
 
 import com.whereyouad.WhereYouAd.domains.advertisement.domain.constant.BudgetFieldType;
 import com.whereyouad.WhereYouAd.domains.advertisement.domain.constant.Provider;
+import com.whereyouad.WhereYouAd.domains.timeline.domain.constant.ComparisonPeriodType;
 import com.whereyouad.WhereYouAd.domains.timeline.domain.constant.MetricType;
 import com.whereyouad.WhereYouAd.domains.timeline.domain.constant.PerformanceStatus;
 
@@ -38,6 +39,7 @@ public record TimelineDetailDTO(
             LocalDate startDate,
             LocalDate endDate,
             PerformanceStatus performanceStatus,
+            ComparisonPeriodType comparisonPeriodType,
             List<MetricType> metrics,
             String summary,
             List<DailyMetricDTO> dailyTrend,
diff --git a/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/application/mapper/TimelineConverter.java b/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/application/mapper/TimelineConverter.java
index 4ecf88cf..705881cb 100644
--- a/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/application/mapper/TimelineConverter.java
+++ b/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/application/mapper/TimelineConverter.java
@@ -31,6 +31,7 @@ public static Timeline toTimeline(
                 .useRoas(dto.metrics().contains(MetricType.ROAS))
                 .comparisonStartDate(comparisonStartDate)
                 .comparisonEndDate(comparisonEndDate)
+                .comparisonPeriodType(dto.comparisonPeriodType())
                 .createdBy(userId)
                 .organization(organization)
                 .build();
@@ -67,6 +68,7 @@ public static TimelineResponse.TimelineDetailDTO toTimelineDetailDTO(
                 timeline.getStartDate(),
                 timeline.getEndDate(),
                 timeline.getPerformanceStatus(),
+                timeline.getComparisonPeriodType(),
                 metrics,
                 timeline.getSummary(),
                 dailyTrend,
diff --git a/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/domain/service/TimelineServiceImpl.java b/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/domain/service/TimelineServiceImpl.java
index d442eae5..469c98b7 100644
--- a/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/domain/service/TimelineServiceImpl.java
+++ b/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/domain/service/TimelineServiceImpl.java
@@ -173,7 +173,8 @@ public TimelineResponse.CreateResponseDTO updateTimeline(Long userId, Long orgId
         // 9. 엔티티 업데이트
         timeline.update(dto.name(), dto.startDate(), dto.endDate(),
                 useClick, useConversion, useImpression, useRoas,
-                comparisonDates.start(), comparisonDates.end());
+                comparisonDates.start(), comparisonDates.end(),
+                dto.comparisonPeriodType());
         // AI 요약도 초기화
         timeline.updateSummary(null);
 
diff --git a/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/persistence/entity/Timeline.java b/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/persistence/entity/Timeline.java
index db322df5..3a51f73c 100644
--- a/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/persistence/entity/Timeline.java
+++ b/src/main/java/com/whereyouad/WhereYouAd/domains/timeline/persistence/entity/Timeline.java
@@ -1,6 +1,7 @@
 package com.whereyouad.WhereYouAd.domains.timeline.persistence.entity;
 
 import com.whereyouad.WhereYouAd.domains.organization.persistence.entity.Organization;
+import com.whereyouad.WhereYouAd.domains.timeline.domain.constant.ComparisonPeriodType;
 import com.whereyouad.WhereYouAd.domains.timeline.domain.constant.PerformanceStatus;
 import com.whereyouad.WhereYouAd.global.common.BaseEntity;
 import jakarta.persistence.*;
@@ -53,6 +54,10 @@ public class Timeline extends BaseEntity {
     @Column(name = "comparison_end_date", nullable = false)
     private LocalDate comparisonEndDate;
 
+    @Enumerated(EnumType.STRING)
+    @Column(name = "comparison_period_type", nullable = false)
+    private ComparisonPeriodType comparisonPeriodType;
+
     @Enumerated(EnumType.STRING)
     @Column(name = "performance_status")
     private PerformanceStatus performanceStatus;
@@ -84,7 +89,8 @@ public void update(String name,
                        boolean useImpression,
                        boolean useRoas,
                        LocalDate comparisonStartDate,
-                       LocalDate comparisonEndDate
+                       LocalDate comparisonEndDate,
+                       ComparisonPeriodType comparisonPeriodType
     ) {
         this.name = name;
         this.startDate = startDate;
@@ -95,5 +101,6 @@ public void update(String name,
         this.useRoas = useRoas;
         this.comparisonStartDate = comparisonStartDate;
         this.comparisonEndDate = comparisonEndDate;
+        this.comparisonPeriodType = comparisonPeriodType;
     }
 }