Abstract: A cooling structure for a construction machine is disclosed to minimize the occurrence of a turbulent flow of air, provide a better cooling ability, and reduce surroundings noise. A recess is formed in a portion of an engine cover above a front portion of an engine, and exhaust ports are formed in a slope of the recess on the same side as a fan. A space having a proper size is thereby defined among a portion of the engine cover, which is positioned radially outside the fan, the exhaust ports and the fan. That portion of the engine cover constitutes a first guide for guiding the cooling air just after having passed the fan, as a laminar flow, to the exhaust ports, and an opposite slope of the recess constitutes a second guide for guiding the cooling air discharged through the exhaust ports as a laminar flow.