Part assembling apparatus for vehicle

A part assembling apparatus for a vehicle that assembles constituent elements in a part that is transferred through a part transfer line to be received in a jig and that automatically assembles the part by selectively mounting various applications that test the part of which assembly is complete, comprising:

• a base frame installed at a work place to correspond to the jig;
• a mounting plate mounted to slidably move upward and downward at a front side of the base frame and configured to mount various applications to be used upon assembling and testing the part at a front surface;
• and
• at least one operation cylinder mounted to the base frame at the rear side of the mounting plate, in which a front end of an operation load is connected to a rear surface of the mounting plate, and disposed at a variable location on a width direction of the base frame based size, shape, and weight of the application that is mounted to the mounting plate.