An ice maker includes 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.