Positioning device for an industrial robot

A positioning device for setting an origin position of a multi-articulated industrial robot comprising a pair of positioning jigs capable of being attached to an extremity of a robot wrist and a stationary part, respectively, of a robot unit of a multi-articulated industrial robot, wherein,

• said pair of positioning jigs of the positioning device comprise respectively,
• a polygonal male jig detachably attachable to said robot wrist;
• a polygonal female jig detachably attachable to said stationary part of said robot unit, said polygonal female jig further having at least, three inner flat surfaces able to confront at least three corresponding outer flat surfaces provided on said polygonal male jig;
• and,
• pressing means arranged on said female jig for pressing the outer flat surfaces of said male jig into close contact with said inner flat surfaces of said polygonal recess of said female jig.