Abstract: A plurality of rotatable attracting units are mounted on a rotary member each for attracting the bottom of one of the can barrels supplied from a supply path in a first position. Each attracting unit is inactivatable to release the one can barrel onto a conveyor path in a second position after the one can barrel has been rotated by the rotary member through a prescribed angle from the first position to the second position. A holder is disposed in the first position for holding the can barrels, one at a time, supplied from the supply path while centrally aligning the bottom of the can barrel with the center of rotation of the attracting unit in the first position. The attracting unit is stopped by a retarder against rotation about its own axis when the attracting unit is moved into the first position and attracts the can barrel held by the holder.