A projection-type image display apparatus includes a body including an air inlet and an air outlet and accommodating a heating element; a lamp unit including a light-source lamp and a housing that accommodates the light-source lamp and that includes an air intake and an exhaust opening communicating with the air outlet; a duct unit including a first end adjacent to the air inlet, a second end adjacent to the air intake, and a flow channel connecting the first and second ends; a radiating unit thermally connected to the heating element, at least part of the radiating unit being disposed inside the flow channel of the duct unit; and a fan, drawing air from the air inlet through the first end of the duct unit and sending the air to the air intake through the second end, disposed between the radiating unit and the second end.