A motorcycle includes a head pipe arranged at a front portion of a body and configured to pivotally support a front fork; a main frame passing an upper side of an engine from the head pipe and extending towards a rear of the body; a rear frame extending towards the rear of the body from the main frame and supporting a seat at an upper side thereof; an air cleaner case at a lower side of the seat; and an air cleaner element arranged inside the air cleaner case and configured to clean air, wherein the rear frame includes a pair of left and right rear bodies of a plate shape which cover sides of the air cleaner case, and a plurality of cross members configured to couple the left and right rear bodies, and wherein each rear body is formed with a projection projecting towards an inner side of the body, and a receiving portion configured to fit the projection is formed on the air cleaner case.