Abstract: The invention relates to a manipulator for positioning workpieces with respect to an industrial robot (4) by which the work pieces, one after the other, are to be processed. The manipulator (2) comprises at least two fixture supports (26,27) each having fixture members for holding a respective work piece, a holder (16) for the fixture supports, movably suspended for moving one of said fixture supports from a loading position, in which exchange of a work piece held in said fixture members may take place, towards an operative position within the operating range of the robot, while simultaneously moving another one of said fixtures from the operative position towards the loading position. A turning servo motor (32) common to the fixture supports is drivingly engageable with a fixture support (26) held in the operative position so as to be able to rotate said fixture support, e.g.