A workpiece reverse support device (29) has a pair of workpiece pinching members (47A, 47B) for abutting on their respective opposing side portions of the workpiece (13) held by the robot hand so as to pinch the workpiece (13) and a pinching state switching unit (55) for switching the pair of workpiece pinching members (47A, 47B) between a pinching state of pinching the workpiece (13) and a releasing state of releasing the workpiece (13). In a workpiece reverse support device for supporting a face/back reverse of a workpiece in a robot hand, flexibility of its installation state, namely installation location, installation posture, or the like can be enhanced.