The endoscope apparatus includes a housing, a first heating element disposed in the housing and generating heat, a second heating element disposed in the housing and configured to cool the first heating element in the vicinity of the first heating element, An air blower unit disposed in the cabinet for allowing gas to pass therethrough a blower unit disposed in the cabinet and configured to open and close one of the upper side and the lower side in the height direction of the casing with respect to a gas flow path passing through the vicinity of the first heat generator A second heating element provided on a flow path of a gas passing through the vicinity of the first heating element by the blower, and the flow path of the gas after passing through the vicinity of the first heating element is defined as the And a guiding plate having an inclination to change to the other one of the upper side and the lower side in the height direction of the casing.内視鏡装置は、筐体と、前記筐体内に配置され、発熱する第1発熱体と、前記筐体内に配置され、前記第1発熱体の近傍において前記第1発熱体を冷却するための気体を通過させる送風部と、前記筐体内に配置され、前記送風部により前記第1発熱体の近傍を通過する気体の流路に対して前記筐体の高さ方向の上方および下方のうち一方に設けられる第2発熱体と、前記送風部により前記第1発熱体の近傍を通過する気体の流路上に設けられ、前記第1発熱体の近傍を通過した後の前記気体の流路を前記筐体の高さ方向の上方および下方のうち他方に変更する傾斜を有する導流板と、を有する。
