To enable an appropriate change of water supply time by a method wherein a water supplying valve is controlled in such a way as to supply a predetermined amount of water to an ice making pan according to an adjusted water supply time and the adjusted water supply time is displayed.

A water supply time adjustment means 32 adjusts a water supply time in such a way that a water supply amount to be supplied to an ice making pan may be adjusted in a stepwise manner. A water supply valve 6 is controlled by the control means 22 in such a manner that a desired amount of water is supplied to the ice making pan. Then, together with employment of control by use of the control means 22, a displaying means 36 is provided at an operating panel section and the water supply time adjusted by the water supply time adjustment means 32 is displayed by a display panel of the displaying means 36. With such an arrangement as above, it becomes possible to change a appropriate water supply time and also to perform an easy adjustment of an amount of supply water to be supplied to the ice making pan.