A cooking appliance, comprising: a housing forming a cooking space, the cooking space being surrounded by a bottom surface, two lateral surfaces (120, 130) and a rear surface, the housing comprises an open upper surface and an open front surface; a door comprising a door upper surface part for covering the open upper surface of the housing and a door front surface part connected to a front side of the door upper surface part and for covering the open front surface of the housing; a control board being accommodated in a space in the door front surface part; a cooling fan for discharging air in the space where the control board is installed out of the door; and at least one of a temperature sensor and/or a touch manipulation part that are installed in the door front surface part; wherein the door front surface part is provided with a cooling hole that forms a passage opening the space in the door front surface part to an outside of the door, wherein the cooling hole is disposed at a lower end of the door front surface part; wherein the temperature sensor and/or the touch manipulation part are disposed between the door upper surface part and the cooling hole; characterized in that the cooling fan is: - disposed between the temperature sensor and the cooling hole, or - disposed between the touch manipulation part and the cooling hole, or - installed in a space being surrounded by the temperature sensor or the touch manipulation part and the cooling hole and the control board. a housing forming a cooking space, the cooking space being surrounded by a bottom surface, two lateral surfaces (120, 130) and a rear surface, the housing comprises an open upper surface and an open front surface; a door comprising a door upper surface part for covering the open upper surface of the housing and a door front surface part connected to a front side of the door upper surface part and for covering the open front surface of the housing; a control board being accommodated in a space in the door front surface part; a cooling fan for discharging air in the space where the control board is installed out of the door; and at least one of a temperature sensor and/or a touch manipulation part that are installed in the door front surface part; wherein the door front surface part is provided with a cooling hole that forms a passage opening the space in the door front surface part to an outside of the door, wherein the cooling hole is disposed at a lower end of the door front surface part; wherein the temperature sensor and/or the touch manipulation part are disposed between the door upper surface part and the cooling hole; characterized in that the cooling fan is: - disposed between the temperature sensor and the cooling hole, or - disposed between the touch manipulation part and the cooling hole, or - installed in a space being surrounded by the temperature sensor or the touch manipulation part and the cooling hole and the control board. - disposed between the temperature sensor and the cooling hole, or - disposed between the touch manipulation part and the cooling hole, or - installed in a space being surrounded by the temperature sensor or the touch manipulation part and the cooling hole and the control board.