An all terrain vehicle for smoothly introducing an exhaust air from a radiator rearward and improving cooling performance for cooling respective members of the vehicle is provided with a front structure, in which a cooling fan is provided on a rear surface of the radiator so that a central portion of the cooling fan is offset from a center of the radiator toward a side opposite to a side on which the belt transmission is arranged, an exhaust pipe connected to a front portion of the cylinder assembly is provided to extend toward the side on which the belt transmission is arranged so that the exhaust pipe extends downward at a portion above the belt transmission, and the inlet duct is provided on the side on which the exhaust pipe is provided so as to vertically extend along the vehicle body frame provided vertically through a portion below the exhaust pipe.