To provide a driving unit of an automatic ice making machine capable of mounting and replacing the automatic ice making machine without changing a control circuit of a refrigerator body.

In this driving unit 5 of the automatic ice making machine 1, a unit case 9 receives a driving section 50 for driving an ice tray and an ice detecting member of the automatic ice making machine 1, and a position detecting device 55 for detecting positions of the ice tray and the ice detecting member, and a control section 6 for controlling a motor 13 of the driving section 50 is also received in the unit case 9. Wiring 70 connected to a thermistor 7 detecting a temperature of the ice tray 2 is connected in the unit case 9, and wiring 14 connected to a water supply pump 11 for supplying the water to the ice tray 2 is connected in the unit case 9.