A straddled vehicle comprising: a water-cooled internal combustion engine including a crankcase having a side wall, a cylinder body connected to the crankcase, and a cylinder head connected to the cylinder body; a water pump; a radiator arranged forward relative to the cylinder body with regard to a front-rear direction of the vehicle; a thermostat arranged forward of the cylinder body and rearward relative to the radiator with regard to the front-rear direction of the vehicle; and an exhaust pipe that is connected to the cylinder head and through which an exhaust gas passes, wherein: a coolant passage through which a coolant flows is formed inside the internal combustion engine; the water pump includes an inlet and an outlet connected to the coolant passage; the exhaust pipe includes an exhaust pipe portion that is located between a front end and a rear end of the water pump with regard to the front-rear direction of the vehicle and said exhaust pipe portion has an upper edge, characterized in that the water pump is attached to the side wall of the crankcase and includes the inlet and the outlet connected directly to the coolant passage; the upper edge of said exhaust pipe portion is located upward relative to a lower end of the water pump with regard to an up-down direction of the vehicle and as the vehicle is seen from the side; and the thermostat is arranged inward relative to the exhaust pipe portion in a vehicle width direction. a water-cooled internal combustion engine including a crankcase having a side wall, a cylinder body connected to the crankcase, and a cylinder head connected to the cylinder body; a water pump; a radiator arranged forward relative to the cylinder body with regard to a front-rear direction of the vehicle; a thermostat arranged forward of the cylinder body and rearward relative to the radiator with regard to the front-rear direction of the vehicle; and an exhaust pipe that is connected to the cylinder head and through which an exhaust gas passes, wherein: a coolant passage through which a coolant flows is formed inside the internal combustion engine; the water pump includes an inlet and an outlet connected to the coolant passage; the exhaust pipe includes an exhaust pipe portion that is located between a front end and a rear end of the water pump with regard to the front-rear direction of the vehicle and said exhaust pipe portion has an upper edge, characterized in that the water pump is attached to the side wall of the crankcase and includes the inlet and the outlet connected directly to the coolant passage; the upper edge of said exhaust pipe portion is located upward relative to a lower end of the water pump with regard to an up-down direction of the vehicle and as the vehicle is seen from the side; and the thermostat is arranged inward relative to the exhaust pipe portion in a vehicle width direction. a coolant passage through which a coolant flows is formed inside the internal combustion engine; the water pump includes an inlet and an outlet connected to the coolant passage; the exhaust pipe includes an exhaust pipe portion that is located between a front end and a rear end of the water pump with regard to the front-rear direction of the vehicle and said exhaust pipe portion has an upper edge, characterized in that the water pump is attached to the side wall of the crankcase and includes the inlet and the outlet connected directly to the coolant passage; the upper edge of said exhaust pipe portion is located upward relative to a lower end of the water pump with regard to an up-down direction of the vehicle and as the vehicle is seen from the side; and the thermostat is arranged inward relative to the exhaust pipe portion in a vehicle width direction.