Automobile body and oil filler seat welding device

The invention discloses an automobile body. The automobile body comprises a side enclosing outer plate (11) and an oil filler seat (12) welded to the side enclosing outer plate (11), wherein the side enclosing outer plate (11) is provided with a first weld face which protrudes out of the surface of the side enclosing outer plate (11), the oil filler seat (12) is provided with a second weld face which is lapped with the first weld face, and a lapped face formed by the first weld face and the second weld face is vertical to the vertical direction of the automobile body. According to the automobile body disclosed by the invention, during the welding of the oil filler seat, a welding clamp does not need to cross over the side enclosing outer plate and a rear wheel casing, so that the welding operation of the oil filler seat is simpler. The invention further discloses an oil filler seat welding device.