Door open-close device for vehicle

A door open-close device configured to open and 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 variable arm motor fixedly disposed on a side of the vehicle body and configured to provide a driving power to operate the door;
• a first variable arm assembly having a first side hingedly coupled to the variable arm motor and a second side hingedly coupled to the side of the door and configured to transmit a rotational force to the door by receiving the driving power of the variable arm motor;
• and
• a second variable arm assembly disposed to be parallel to the first variable arm assembly in a longitudinal direction of the vehicle body, and having a first side hingedly coupled to the side of the vehicle body and a second side hingedly coupled to the side of the door, configured to interact with a pivotal rotation of the first variable arm assembly, and transmit the rotational force to the door.