A construction machine comprising: an engine; an engine guard defining an engine room which is a space where the engine is housed; a heat exchanger disposed in the engine room; a cooling fan disposed in the engine room so as to suck air for cooling from outside of the engine room and to make the air pass through the heat exchanger; a projection element that projects upward beyond the engine guard; and an exhaust duct forming a passage for leading the air, which has passed through the heat exchanger, to outside of the engine room, the exhaust duct having a bent shape including a first duct section that includes an upstream end portion surrounding a duct inlet opened in the engine room and a connection portion closer to the projection element than the upstream end portion, the first duct section extending along an axial flow direction of the cooling fan from the upstream end portion to the connection portion, and a second duct section extending upward from the connection portion of the first duct section and surrounding a duct outlet opened upward outside the engine room, the exhaust duct thereby including an engine concealment section that obstructs a direct view to the engine through the duct outlet from outside the engine room, characterized in that the duct inlet is located downstream of the cooling fan with respect to the axial flow direction and radially outward of the cooling fan; the construction machine comprises a guard covering a part of the projection element except for the distal end portion thereof and projecting upward beyond the upper surface of the other portions of the engine guard; and the first duct section includes a duct top wall that defines an upper end of a passage formed in the first duct section, the duct top wall being configured by a part of an engine hood located on the upper side of the engine room, the part being a portion of the engine guard other than the guard. an engine; an engine guard defining an engine room which is a space where the engine is housed; a heat exchanger disposed in the engine room; a cooling fan disposed in the engine room so as to suck air for cooling from outside of the engine room and to make the air pass through the heat exchanger; a projection element that projects upward beyond the engine guard; and an exhaust duct forming a passage for leading the air, which has passed through the heat exchanger, to outside of the engine room, the exhaust duct having a bent shape including a first duct section that includes an upstream end portion surrounding a duct inlet opened in the engine room and a connection portion closer to the projection element than the upstream end portion, the first duct section extending along an axial flow direction of the cooling fan from the upstream end portion to the connection portion, and a second duct section extending upward from the connection portion of the first duct section and surrounding a duct outlet opened upward outside the engine room, the exhaust duct thereby including an engine concealment section that obstructs a direct view to the engine through the duct outlet from outside the engine room, characterized in that the duct inlet is located downstream of the cooling fan with respect to the axial flow direction and radially outward of the cooling fan; the construction machine comprises a guard covering a part of the projection element except for the distal end portion thereof and projecting upward beyond the upper surface of the other portions of the engine guard; and the first duct section includes a duct top wall that defines an upper end of a passage formed in the first duct section, the duct top wall being configured by a part of an engine hood located on the upper side of the engine room, the part being a portion of the engine guard other than the guard.