diff --git a/src/pages/ProfileEdit/ProfileEdit.page.tsx b/src/pages/ProfileEdit/ProfileEdit.page.tsx
index 1ade3920..a1ae16d3 100644
--- a/src/pages/ProfileEdit/ProfileEdit.page.tsx
+++ b/src/pages/ProfileEdit/ProfileEdit.page.tsx
@@ -91,7 +91,7 @@ const ProfileEdit = () => {
       profileImageUrl: my.profileImageUrl || '',
       skills: selectedSkillDepths.map(({ id, name }) => ({ skillId: id, level: name.split(', ')[1] })),
       joinPurposes: checkboxValue.goal.filter(({ checked }) => checked).map(({ id }) => id),
-      livingPlace: dropdownValue.region,
+      livingPlace: dropdownValue.region || null,
       workingPlace: fieldValue.company,
       introduction: fieldValue.intro,
     });
diff --git a/src/pages/ProfileEdit/types/index.ts b/src/pages/ProfileEdit/types/index.ts
index af46ac5c..eef067c9 100644
--- a/src/pages/ProfileEdit/types/index.ts
+++ b/src/pages/ProfileEdit/types/index.ts
@@ -14,7 +14,7 @@ export interface PutSignUp {
   profileImageUrl: string;
   skills: Omit<ProfileSkill, 'skillName'>[];
   joinPurposes: number[];
-  livingPlace?: string;
+  livingPlace: string | null;
   workingPlace?: string;
   introduction?: string;
 }
diff --git a/src/pages/SignUp/SignUp.page.tsx b/src/pages/SignUp/SignUp.page.tsx
index 4905a791..ad0a5ef3 100644
--- a/src/pages/SignUp/SignUp.page.tsx
+++ b/src/pages/SignUp/SignUp.page.tsx
@@ -94,7 +94,7 @@ const SignUpPage = () => {
       profileImageUrl: memberInfo?.profileImageUrl || '',
       skills: selectedSkillDepths.map(({ id, name }) => ({ skillId: id, level: name.split(', ')[1] })),
       joinPurposes: checkboxValue.goal.filter(({ checked }) => checked).map(({ id }) => id),
-      livingPlace: dropdownValue.region,
+      livingPlace: dropdownValue.region || null,
       workingPlace: fieldValue.company,
       introduction: fieldValue.intro,
       email: memberInfo?.email || '',
diff --git a/src/pages/SignUp/types/index.ts b/src/pages/SignUp/types/index.ts
index 8add0db6..60bd1e11 100644
--- a/src/pages/SignUp/types/index.ts
+++ b/src/pages/SignUp/types/index.ts
@@ -17,7 +17,7 @@ export interface PostSignUp {
     level: string;
   }[];
   joinPurposes: number[];
-  livingPlace?: string;
+  livingPlace: string | null;
   workingPlace?: string;
   introduction?: string;
   email: string;