Door open-close device for vehicle

A door open-close device configured to open or close a door opening portion of a vehicle by sliding and popping up a door disposed in a vehicle body, the door open-close device comprising:

• a main arm motor fixedly disposed on a side of the vehicle body and configured to provide a driving power to operate the door;
• a main arm including a first end portion hingedly coupled to the main arm motor and a second end portion hingedly coupled to a side of the door and configured to transmit a rotation force to the door by receiving the driving power from the main arm motor;
• and
• a variable sub-arm including a first end portion hingedly coupled to the side of the vehicle body, and a second end portion hingedly coupled to the side of the door, and, for opening or closing the door, disposed to change a length of the variable sub-arm along a movement path of a rotation member which is disposed and rotated in a portion of the variable sub-arm.