A seizing head for objects is described that includes a support frame adapted to be coupled to a manipulator robot, and a plurality of picking apparatuses arranged mutually flanked according to a predefined flanking direction and individually adapted to take and withhold at least one object, wherein each picking apparatus is installed on a respective mobile frame, which is slidably coupled to the support frame according to a sliding direction parallel to the flanking direction, and wherein the seizing head further includes a plurality of functionally independent activation devices, each of which is adapted to activate a respective mobile frame along said sliding direction.