An ice maker of the present invention comprises: an upper tray defining an upper chamber that is a portion of an ice chamber; a lower tray rotatable relative to the upper tray and defining a lower chamber that is another portion of the ice chamber, wherein the lower chamber is disposed under the upper chamber; an upper heater disposed around the upper tray, for providing heat to the upper chamber; and a lower heater disposed around the lower tray, for providing heat to the lower chamber, wherein in an ice making position, a distance from a horizontal central line passing a contact surface of the upper tray and the lower tray to the upper heater is shorter than a distance from the horizontal central line to the lower heater.