Disclosed herein is an oven able to reduce the temperature of an upper portion of the front glass through a door duct having an improved flow path structure for some of the air sucked into the inside of the door to reach to the upper portion of the front glass. An oven includes a main body; a cooking room provided inside the main body with an open front; a door, wherein the door includes a front glass installed on a front side; a rear glass installed on a rear side; at least one middle glass arranged between the front glass and the rear glass; a door handle coupled to an upper portion of the front glass; support frames arranged on both sides of the door to fix the front glass, the rear glass, and the middle glass; and a door duct coupled to an upper portion of the support.