A rotor having a plurality of tablet guide paths is rotatably contained in a cassette main body. The rotor facing an inverse conical-shaped inclined inner surface of the cassette main body includes an inclined outer surface in each of the plurality of tablet guide paths. A distance between the inverse conical-shaped inclined inner surface of the cassette main body and the inclined outer surface of the table guide path can be adjusted by raising and lowering the rotor with respect to the cassette main body. A distance between a partitioning member and a tablet support table can be adjusted by raising and lowering the tablet support table provided on a lower side of the partitioning member. A distance between a first vertical protruding piece and a second vertical protruding piece constituting the tablet guide path can be adjusted by relatively rotating a first movable member and a second movable member.