diff --git a/src/main/java/com/spomatch/users/DefaultUserService.java b/src/main/java/com/spomatch/users/DefaultUserService.java
index 8e1e565..f323e76 100644
--- a/src/main/java/com/spomatch/users/DefaultUserService.java
+++ b/src/main/java/com/spomatch/users/DefaultUserService.java
@@ -41,7 +41,7 @@ private UserId getNextId() {
 	}
 
 	@Override
-	public User update(User toUpdate) {
+	public User updateUserInfo(User toUpdate) {
 		
 		for (User user : registeredUsers) {
 			if (user.equals(toUpdate)) {
@@ -53,6 +53,19 @@ public User update(User toUpdate) {
 		throw new UserNotExistException();
 	}
 
+	@Override
+	public User updatePlayers(User toUpdate) {
+		
+		for (User user : registeredUsers) {
+			if (user.equals(toUpdate)) {
+				user.setPlayers(toUpdate.getPlayers());
+				return user;
+			}
+		}
+		
+		throw new UserNotExistException();
+	}
+
 	private User cloneUser(User toClone) {
 		
 		User user = new User();
@@ -68,8 +81,14 @@ private User cloneUser(User toClone) {
 	}
 
 	@Override
-	public void cancel(User toCancel) {
-		registeredUsers.removeIf(user -> user.equals(toCancel));
+	public void cancel(UserId idToCancel) {
+		
+		User toCancel = getById(idToCancel);
+		
+		if (toCancel.getPlayerSize() > 0)
+			throw new PlayerExistWhenCancelMembershipException();
+		
+		registeredUsers.removeIf(user -> user.getId().equals(idToCancel));
 	}
 
 	@Override
diff --git a/src/main/java/com/spomatch/users/PlayerExistWhenCancelMembershipException.java b/src/main/java/com/spomatch/users/PlayerExistWhenCancelMembershipException.java
new file mode 100644
index 0000000..dbdb33d
--- /dev/null
+++ b/src/main/java/com/spomatch/users/PlayerExistWhenCancelMembershipException.java
@@ -0,0 +1,18 @@
+package com.spomatch.users;
+
+/**
+ * 회원 탈퇴 시도 시 플레이어가 존재하는 경우 던져지는 예외
+ *  
+ * @author Seongbin Kim
+ */
+public class PlayerExistWhenCancelMembershipException extends RuntimeException {
+
+	private static final long serialVersionUID = 5362410971263147389L;
+
+	public PlayerExistWhenCancelMembershipException() {
+	}
+
+	public PlayerExistWhenCancelMembershipException(String message) {
+		super(message);
+	}
+}
diff --git a/src/main/java/com/spomatch/users/User.java b/src/main/java/com/spomatch/users/User.java
index 48c5d4e..d2316d0 100644
--- a/src/main/java/com/spomatch/users/User.java
+++ b/src/main/java/com/spomatch/users/User.java
@@ -172,7 +172,6 @@ public void removePlayerBySportsType(SportsType typeToRemove) {
 	}
 
 	public void updateUserInfo(User toUpdate) {
-		
 		this.pw = toUpdate.pw;
 		this.preferredLocations = toUpdate.preferredLocations;
 		this.age = toUpdate.age;
diff --git a/src/main/java/com/spomatch/users/UserService.java b/src/main/java/com/spomatch/users/UserService.java
index a52d532..25d44a2 100644
--- a/src/main/java/com/spomatch/users/UserService.java
+++ b/src/main/java/com/spomatch/users/UserService.java
@@ -4,9 +4,11 @@ public interface UserService {
 
 	User register(User user);
 
-	User update(User registered);
+	User updateUserInfo(User toUpdate);
 
-	void cancel(User user);
+	User updatePlayers(User toUpdate);
+
+	void cancel(UserId idToCancel);
 
 	User getById(UserId id);
 
diff --git a/src/test/java/com/spomatch/users/TestUserService.java b/src/test/java/com/spomatch/users/TestUserService.java
index aa4e01f..fcbcbb0 100644
--- a/src/test/java/com/spomatch/users/TestUserService.java
+++ b/src/test/java/com/spomatch/users/TestUserService.java
@@ -7,6 +7,9 @@
 import org.apache.commons.lang3.RandomStringUtils;
 import org.junit.Test;
 
+import com.spomatch.users.players.Player;
+import com.spomatch.users.players.SoccerPlayer;
+
 /**
  * 유저 서비스의 도메인 규칙을 분석하여 서비스의 스펙을 정의하고, 테스트합니다.
  * 
@@ -119,7 +122,7 @@ public class TestUserService {
 		registered.setIdForLogin(newIdForLogin);
 		registered.setName(newName);
 		
-		User updated = userService.update(registered);
+		User updated = userService.updateUserInfo(registered);
 		
 		// then
 		assertEquals(newPassword, updated.getPw());
@@ -137,11 +140,28 @@ public class TestUserService {
 		User user = registerDummy();
 		
 		// when
-		userService.cancel(user);
+		userService.cancel(user.getId());
 		
 		userService.getById(user.getId());
 	}
 
+	// then
+	@Test(expected = PlayerExistWhenCancelMembershipException.class)
+	public void 회원은_탈퇴할_수_있다_플레이어가_있어서_실패() {
+		
+		// given
+		User user = registerDummy();
+		
+		Player soccerPlayer = new SoccerPlayer();
+		
+		user.addPlayer(soccerPlayer);
+		
+		userService.updatePlayers(user);
+		
+		// when
+		userService.cancel(user.getId());
+	}
+
 	private User registerDummy() {
 		User toRegister = UserTests.createDummy();