To include a rotating holder 30 that is rotatably arranged in an opening of a casing 10 and detachably holds a part of a sperm sampler, a motor 50 that rotates and drives the rotating holder, a control unit 60, a battery 70, a single switch 20, 67, and an angular speed sensor 61 that detects an angular speed of the casing 10, where the control unit changes a rotation direction and a rotation speed of the motor according to a change in a turning angle of the casing 10.
