A medicine feeder is provided that causes no axial rotation beyond control during fitting between transmission mechanisms. The medicine feeder includes a medicine storing device (120) and a drive device (130). The medicine storing device (120) includes a container and a discharge mechanism. The container stores medicines. The discharge mechanism is rotationally driven to discharge the medicines from the container, and includes a first transmission mechanism (60) with a fitting portion (61). The drive device (130) rotationally drives the discharge mechanism when the medicine storing device (120) is brought into a cooperation enabling position, and includes a second transmission mechanism (70) with a fitted portion (76). When the fitting portion (61) of the first transmission mechanism (60) and the fitted portion (76) of the second transmission mechanism (70) are fitted with each other, the drive device (130) can rotationally drive the discharge mechanism of the medicine storing device (120). The fitted portion (76) is supported to be displaceable in the axial direction of a drive shaft (71), and moved by an energy storing member (75).