To provide a palletizer, capable of surely supplying only one separate sheet between stages of can bodies.

The palletizer 10 configured to alternately stack a can 12 and a rectangular separate sheet 13 on a pallet 11 in multistage includes a can supply unit 20 which disposes a plurality of cans 12 on the pallet 11; and a sheet supply unit 30 which places the separate sheet 13 on the cans 12 disposed on the pallet 11. The sheet supply unit 30 includes a sheet holding section which holds a plurality of separate sheets 13 in a stacked state; and a sheet carrying section which sucks the separate sheet 13 of the top stage from the sheet holding section by a suction pad 51 to bring up and carry it. The palletizer further includes a sheet pressing portion 42 which abuts on an angle portion of the separate sheet 13 when the separate sheet 13 is brought up, and the suction pad 51 sucks the separate sheet 13 inside the sheet pressing portion 42.