diff --git a/4th_session/register.py b/4th_session/register.py
new file mode 100644
index 00000000..7d43746f
--- /dev/null
+++ b/4th_session/register.py
@@ -0,0 +1,69 @@
+print('=========================')
+print('회원가입')
+print('=========================')
+
+register=False
+
+while not register:
+    print('회원가입을 진행하시겠습니까?')
+    print('y: 진행            N: 취소')
+    answer=input('>> ')
+    answer=answer.lower()
+
+    if answer=='y':
+        register=True
+        print('=========================')
+        print('회원가입이 진행됩니다.')
+        print('=========================')
+    elif answer=='n':
+        print('=========================')
+        print('회원가입이 취소됩니다.')
+        print('=========================')
+    else:
+        print('입력 값을 확인해주세요.')
+
+#2
+users=[]
+
+while True:
+    user={}
+    username=input('ID: ')
+    while True:
+        pwd=input('PWD: ')
+        pwd2=input('PWD 확인: ')
+        if pwd==pwd2:
+            break
+        else:
+            print('패스워드가 일치하지 않습니다.')
+    name=input('이름: ')
+    while True:
+        birth=input('생년월일(6자리): ')
+        if len(birth)==6:
+            break
+        else:
+            print('생년월일 입력값이 올바르지 않습니다.')
+    email=input('이메일: ')
+
+    #3
+    user['username']=username
+    user['password']=pwd
+    user['name']=name
+    user['birth']=birth
+    user['email']=email
+    
+    users.append(user)
+    print(users)
+
+    print('=========================')
+    print(user['name'],'님 가입을 환영합니다!')
+    print('=========================')
+
+    print('회원가입을 추가로 진행하시겠습니까?')
+    print('y: 진행                   n: 취소')
+    answer=input('>> ')
+    answer=answer.lower()
+
+    if answer=='y':
+        pass
+    elif answer=='n':
+        exit()