A heating cooking apparatus comprising: a heating cooking chamber including an accommodation space where an object to be heated is accommodated and an opening communicating with the accommodation space; a lid portion configured to close the opening; a heat supply unit configured to supply heat into the accommodation space; a pull-out body that is pulled out freely relative to the accommodation space; a housing configured to accommodate the heating cooking chamber; and a pair of slide rails slidably support the pull-out body, wherein the pull-out body includes the lid portion, the lid portion includes a see-through window portion configured to make the accommodation space visible, the see-through window portion includes three glass plates, the three glass plates include a heat-ray reflecting glass configured to reflect heat rays, a first glass plate located proximate to the accommodation space, and a second glass plate located opposite to the accommodation space, the heat-ray reflecting glass is located between the first glass plate and the second glass plate, the first glass plate, the heat-ray reflecting glass, and the second glass plate are arranged side by side in a line at intervals along a pull-out direction of the pull-out body, characterized in that a fan is disposed in a first space formed between the heating cooking chamber and the housing; and a first air deflecting plate and a second air deflecting plate are disposed in the first space, the first air deflecting plate guiding part of blown air flow blown out by the fan to a first slide rail of the pair of slide rails, the second air deflection plate guiding part of blown air flow to a second slide rail of the pair of slide rails. a heating cooking chamber including an accommodation space where an object to be heated is accommodated and an opening communicating with the accommodation space; a lid portion configured to close the opening; a heat supply unit configured to supply heat into the accommodation space; a pull-out body that is pulled out freely relative to the accommodation space; a housing configured to accommodate the heating cooking chamber; and a pair of slide rails slidably support the pull-out body, wherein the pull-out body includes the lid portion, the lid portion includes a see-through window portion configured to make the accommodation space visible, the see-through window portion includes three glass plates, the three glass plates include a heat-ray reflecting glass configured to reflect heat rays, a first glass plate located proximate to the accommodation space, and a second glass plate located opposite to the accommodation space, the heat-ray reflecting glass is located between the first glass plate and the second glass plate, the first glass plate, the heat-ray reflecting glass, and the second glass plate are arranged side by side in a line at intervals along a pull-out direction of the pull-out body, characterized in that a fan is disposed in a first space formed between the heating cooking chamber and the housing; and a first air deflecting plate and a second air deflecting plate are disposed in the first space, the first air deflecting plate guiding part of blown air flow blown out by the fan to a first slide rail of the pair of slide rails, the second air deflection plate guiding part of blown air flow to a second slide rail of the pair of slide rails.