An image projector, comprising: a case (59, 53); and a projection optical unit (30, 40) to project an image on a projection surface, the projection optical unit contained in the case and comprising a first optical unit, including a projection lens unit and a lens holder, and a second optical unit, including a reflecting mirror and a curved mirror, wherein the first and second optical units (30, 40) are arranged adjacent to each other in a direction parallel to a minor axis of the projected image so as to form a gap between the lens holder and the curved mirror; wherein: the projection optical system can project the image while the curved mirror is in the case; the case (59, 53) includes: an exhaust vent that is located on a predetermined surface of the case (59, 53) at a position facing a first fan; a first intake duct provided on a surface of the case (59, 53) so as to face a second fan; and a second intake duct provided on a surface different than the surface where the first intake duct is provided, air that flows from the first intake duct toward the exhaust vent is prevented from flowing in the gap, there is no intake fan facing the second intake duct, air that flows from the second intake duct toward the exhaust vent flows in the gap; and air flows into the second optical unit through the gap. a case (59, 53); and a projection optical unit (30, 40) to project an image on a projection surface, the projection optical unit contained in the case and comprising a first optical unit, including a projection lens unit and a lens holder, and a second optical unit, including a reflecting mirror and a curved mirror, wherein the first and second optical units (30, 40) are arranged adjacent to each other in a direction parallel to a minor axis of the projected image so as to form a gap between the lens holder and the curved mirror; wherein: the projection optical system can project the image while the curved mirror is in the case; the case (59, 53) includes: an exhaust vent that is located on a predetermined surface of the case (59, 53) at a position facing a first fan; a first intake duct provided on a surface of the case (59, 53) so as to face a second fan; and a second intake duct provided on a surface different than the surface where the first intake duct is provided, air that flows from the first intake duct toward the exhaust vent is prevented from flowing in the gap, there is no intake fan facing the second intake duct, air that flows from the second intake duct toward the exhaust vent flows in the gap; and air flows into the second optical unit through the gap. the projection optical system can project the image while the curved mirror is in the case; the case (59, 53) includes: an exhaust vent that is located on a predetermined surface of the case (59, 53) at a position facing a first fan; a first intake duct provided on a surface of the case (59, 53) so as to face a second fan; and a second intake duct provided on a surface different than the surface where the first intake duct is provided, an exhaust vent that is located on a predetermined surface of the case (59, 53) at a position facing a first fan; a first intake duct provided on a surface of the case (59, 53) so as to face a second fan; and a second intake duct provided on a surface different than the surface where the first intake duct is provided, air that flows from the first intake duct toward the exhaust vent is prevented from flowing in the gap, there is no intake fan facing the second intake duct, air that flows from the second intake duct toward the exhaust vent flows in the gap; and air flows into the second optical unit through the gap.