An ice maker including piping for water drainage therein is provided. The ice maker includes a cabinet body, an ice storage portion provided in the cabinet body and separable from the cabinet body, a first coupling portion disposed on a lower surface of the ice storage portion and having a first coupling hole, a drain portion provided downwardly of the cabinet body within the cabinet body and including a drainage passage connected to an external drainage hole, and an overflow socket inserted into the first coupling hole and connected to the drainage passage to connect the ice storage portion to the drain portion, and configuring a path allowing water received by the ice storage portion to be discharged to the drainage passage, thereby providing an ice maker having easy separation and coupling.