A cooking device comprising: a device body with a heating chamber; a heating unit for heating an object to be heated placed in the heating chamber; a door for opening and closing an opening of the heating chamber; an operation unit provided on the door, the operation unit outputting a control signal corresponding to a designated cooking menu; a door wireless communication unit provided on the door, the door wireless communication unit transmitting the control signal from the operation unit in a form of a wireless signal; and a main wireless communication unit for receiving the wireless signal from the door wireless communication unit, and transmitting the wireless signal in a form of the control signal to a controller for controlling the heating unit; wherein the door has a handle, and the operation unit and the door wireless communication unit are provided on the handle, wherein the device body is covered with a metal, and includes a radio transmission section inside for passing a radio wave therethrough; characterized in that: the radio transmission section is formed of a hole and a radio transmission path; the radio transmission path has a duct shape formed by a metal plate forming an outer wall of the device body and a metal partition wall different from said metal plate; the hole is provided on a rim around the opening of the heating chamber; and the radio transmission path connects the hole and an upper part of the controller, wherein the hole is provided at one longitudinal end of the transmission path, and the controller is provided at the other longitudinal end of the transmission path. a device body with a heating chamber; a heating unit for heating an object to be heated placed in the heating chamber; a door for opening and closing an opening of the heating chamber; an operation unit provided on the door, the operation unit outputting a control signal corresponding to a designated cooking menu; a door wireless communication unit provided on the door, the door wireless communication unit transmitting the control signal from the operation unit in a form of a wireless signal; and a main wireless communication unit for receiving the wireless signal from the door wireless communication unit, and transmitting the wireless signal in a form of the control signal to a controller for controlling the heating unit; wherein the door has a handle, and the operation unit and the door wireless communication unit are provided on the handle, wherein the device body is covered with a metal, and includes a radio transmission section inside for passing a radio wave therethrough; characterized in that: the radio transmission section is formed of a hole and a radio transmission path; the radio transmission path has a duct shape formed by a metal plate forming an outer wall of the device body and a metal partition wall different from said metal plate; the hole is provided on a rim around the opening of the heating chamber; and the radio transmission path connects the hole and an upper part of the controller, wherein the hole is provided at one longitudinal end of the transmission path, and the controller is provided at the other longitudinal end of the transmission path. the radio transmission section is formed of a hole and a radio transmission path; the radio transmission path has a duct shape formed by a metal plate forming an outer wall of the device body and a metal partition wall different from said metal plate; the hole is provided on a rim around the opening of the heating chamber; and the radio transmission path connects the hole and an upper part of the controller, wherein the hole is provided at one longitudinal end of the transmission path, and the controller is provided at the other longitudinal end of the transmission path.