A dispensing apparatus includes an output shaft having screw grooves on an outer circumferential surface, a rotary actuator including a reduction gear and configured to rotate the output shaft around an axis thereof, a piston screwed into the screw grooves and configured to move back and forth along an axial direction of the output shaft by drive of the rotary actuator, a nozzle disposed at a leading end of the dispensing apparatus and configured to suck and spout liquid along with the piston, and an actuator case configured to cover the reduction gear, and configured to support a proximal end portion of the output shaft by a leading end portion of the actuator case such that the proximal end portion of the output shaft is engaged with a leading end portion of the reduction gear in a state capable of transmitting the drive.