PURPOSE: To provide a robot which can supply/discharge a work to/from a jig precisely without any slippage of the position.

CONSTITUTION: A robot is provided with an arm 1, which is movable by servo control to the three axial directions crossing at right angles one another, and a work gripping chuck 2, which is provided in the arm 1. The arm 1 is provided with a position correcting chuck 34, which pipes a positioning reference plane of a jig 3. When the servo control is turned off to set the arm 1 in a free condition the reference plane of the jig 3 is gripped by the position correcting chuck 34 under this free condition. In this way, a slippage in the position of the work gripping chuck 2 to the position reference plane of the jig 3 is corrected.