A four-wheeled vehicle is provided which increases and secures the volume of an air cleaner while avoiding increase in the number of components and reducing the influence of the air cleaner on other components. The vehicle is equipped with a driver seat and a passenger seat arranged on a vehicle body frame side by side in the vehicle width direction, and is equipped with an engine disposed on the vehicle body frame substantially at the center in the front-rear direction of the vehicle. An air cleaner, constituting a part of an intake device of the engine and formed in an elongated shape in the vehicle width direction, is disposed between the driver seat and the passenger seat.