Refrigerator

A refrigerator comprising:

• a cabinet forming a storage space;
• a door opening and closing the storage space;
• and
• an ice maker making ice,
• wherein the ice maker includes:
• a first tray formed of a metal material and having a plurality of first tray cells continuously formed,
• a second tray having a plurality of second tray cells configured to open and close the first tray and to form cells for making ice by contacting the first tray cells, and
• a heater arranged to pass through a perimeter of the plurality of first tray cells, and
• wherein a length of the heater passing through first tray cells located at both ends of the first tray among the plurality of first tray cells is longer than a length of the heater passing through first tray cells located at the center of the first tray among the plurality of first tray cells, and
• wherein an amount of heat provided to each of the first tray cells is uniform.