COOLING SYSTEM

Object Improving the cooling performance of a cooling medium in a cooling system including a radiator mounted in a vehicle, a fan that generates cooling air to cool the radiator, and a shroud that is provided between the fan and the radiator and guides the cooling air. Solving Means In a cooling system 100 including a rear radiator 30 that is mounted in a vehicle 1 and circulates cooling water to release heat of the cooling water, a fan 40 that generates cooling air to cool the rear radiator 30, and a shroud 50 that is provided between the fan 40 and the rear radiator 30 and guides the cooling air, the shroud 50 has a double structure having an internal space S10 and the internal space S10 allows the cooling water to pass through the internal space S10 when the cooling water circulates.