Disclosed is an oven which provides convenient removal of a rack, achieving enhanced usability. The oven includes a cabinet having a chamber, a door to open or close the cabinet, a rack assembly including an operating member to support a cooking object seated thereon, the operating member being removable from the chamber, and a support member fixed inside the chamber to support the operating member, and a spring device including a first fixing piece located at the operating member, a second fixing piece located at the support member, and an elastic member having one side connected to the first fixing piece and the other side connected to the second fixing piece and located in a vertical gap between the operating member and the support member so as to be elastically restored by a distance between the first and second fixing pieces to remove the operating member from the chamber.