PROBLEM TO BE SOLVED: To simply adjust the width of a guide groove of a rotor according to sizes of tablets to be dispensed.SOLUTION: A tablet cassette has: a cassette body containing the tablets； and a rotor, which is rotation-drivably arranged on the bottom of a tablet containing part of the cassette body, and in which a plurality of tablet guide grooves 88 extending in an axial direction on an outer peripheral surface are formed. Groove width adjusting mechanisms 17, 18 are arranged which relatively move both sides of the tablet guide grooves 88 in the circumferential direction of the rotor.【課題】払い出す錠剤の大きさに応じて、ロータの案内溝の幅を簡単に調整する。【解決手段】錠剤を収容するカセット本体と、カセット本体の錠剤収容部の底に回転駆動可能に配設され、外周面に軸方向に延びる複数の錠剤案内溝８８が形成されたロータとを有する。錠剤案内溝８８の両側の側面をロータの周方向に相対的に移動させる溝幅調整機構１７，１８を設ける。【選択図】図１９
