To provide a vehicle fuel tank which generates strong turbulent flow in a fuel colliding to a baffle plate thereby effectively reducing collision energy and suppressing emission of flow sounds to the exterior of the fuel tank.

A vehicle fuel tank includes: a tank body 2 for accumulating a fuel F of an internal combustion engine mounted on a vehicle; and a horizontal baffle plate 5 which is disposed in the tank body 2 and inhibits oscillations of the fuel F. The horizontal baffle plate 5 includes multiple protruding parts 51 which protrude from a surface of the horizontal baffle plate 5. Each protruding part 51 is formed so that its cross section area reduces from a base end to a tip and includes a through hole 52 at a tip part.