[Object] An object of the present invention is to clear a jammed tablet in a medicine feeder upon detection thereof, through improvements on a drive unit so that reverse rotation of a rotor can be achieved without driving a motor in reverse rotating direction, i . e. , while the motor is in normal rotation setting.[Means for Solution] A medicine feeder's drive unit 17 includes a drive motor, a gear transmission device, an output shaft 31 and a switcher. The gear transmission device is constituted by a normal-rotation transmission path 45 and a reverse-rotation transmission path 46 provided between a motor shaft 41 of the drive motor and the output shaft 31. The switcher selects one of the transmission paths 45, 46 for output of driving power from the drive motor.
