Gripper of robot for assembling vehicle

A gripper of a robot for assembling a vehicle is provided, including: a gripper body that extends vertically; a lower grip that bends forward from a lower end of the gripper body and supports a lower end of an assembly object; an upper grip that is hinged at a rear end to an upper end of the gripper body and grips an upper end of the assembly object when rotating forward by extending forward at a front end of the upper grip; a seat that extends and bends rearward from the upper end of the gripper body; a link assembly that is composed of a first link and a second link that connect an upper end of the seat and the upper grip via the link assembly; and a driving unit that rotates the upper grip forward or rearward by transmitting a driving force to the link assembly.