A paper sheet accommodating apparatus includes: a reel configured to supply a winded belt-like member; a drum configured to roll up a paper sheet together with the belt-like member supplied from the reel; and a transmission unit configured to transmit, at a time of roll-up of the belt-like member that is caused by rotation of the drum, rotation of the reel co-rotating with the roll-up, to the drum, to assist rotation of the drum.