Ice making apparatus of refrigerator and assembling method thereof

An ice making apparatus of a refrigerator capable of preventing a sensor wire connected from a sensor unit installed therein from being twisted irrespective of a rotation of an ice tray, and a method for assembling a sensor wire and an ice making apparatus of a refrigerator are provided. The ice making apparatus of a refrigerator includes: an ice tray for accommodating water for making ice; a sensor unit installed at a lower portion of the ice tray; a sensor wire transferring data measured by the sensor unit to a controller of the refrigerator; a driving unit formed at one side of the ice tray and including a controller or a motor to rotate the ice tray; a driving rotational shaft formed at one side of the ice tray and rotated by the motor of the driving unit; a rotational shaft support unit formed on the opposite side of the driving unit, supporting the other side of the ice tray, and having a rotational shaft hole; and a support rotational shaft formed on the other side of the ice tray, inserted into the rotational shaft hole of the rotational shaft support unit, supportedly rotated therein, and having a through hole allowing the sensor wire to pass therethrough (Fig. 2).