A cushion rubber provided independent from a flange of a fuel tank. A fuel tank is arranged above a main frame. A tank front stay, which is mounted on a front lower portion of the fuel tank, is made to overlap with a tank-front-side mounting boss, which is formed on a front end bent portion of the main frame, and is fastened to the tank-front-side mounting boss using a bolt from sideward. The tank front stay is provided independently from a flange, is welded to a bottom surface of the fuel tank, and projects downward from the inside of the flange. A sleeve portion is mounted on a lower end of the tank front stay, and a mount rubber is inserted into the sleeve portion thus providing a rubber mount.