The present invention relates to an ice maker and a method for making ice, and more particularly, to an ice maker provided in a refrigerating chamber of a refrigerator and an ice making method. According to an ice maker and an ice making method, there is no need for forming an additional duct to supply cold air to the ice maker in order to make ice, whereby it is possible to simplify a manufacturing process of a refrigerator and to reduce manufacturing costs of a refrigerator. In addition, since a portion of refrigerant used in a refrigeration cycle of the refrigerator is used for making ice, no additional energy is required for making ice, thereby reducing energy consumption.