A trailing end of a sheet stored in a cassette body is regulated by a first trailing end regulating member 4 and a second trailing end regulating member 5. the member 4 is provided to be slid in a cassette case 3 where the sheet is stored, and the member 5 is provided in the member 4 to be slid. In addition, at positions according to a size of the sheet that is stored in the cassette case 3, the member 4 is held by a first holding portion and the member 5 is held by a second holding portion. In addition, holding of the member 4 by the first holding portion and holding of the member 5 by the second holding portion are released by the operation of a trailing end regulating lever 61.