Disclosed is a compact bill accumulation device which has a bill accumulation space with decreased depth and does not cause bill accumulation errors. The bill accumulation device (100) is provided with front guides (8) and reverse guides which form a bill accumulation space, and with a bill stopper (6) which, disposed on the front guides (8), stops bills released by a by a feed roller (1), wherein bills stopped by said bill stopper (6) are accumulated on a stage (4). Multiple V-shaped grooves are formed on elongate ribs (18) and disposed along the long direction of the ribs, said grooves extending in the short direction thereof; said ribs (18) are arranged in rows and at prescribed intervals on either side of the front guides (8) so as to be perpendicular to said released bills.