Fuel tank, wing, aircraft fuselage, aircraft and mobile

Reducing working time and costs in the manufacturing process, the objective fuel tank capable of preventing an increase in weight, wing, aircraft fuselage, to provide the aircraft and mobile. Fuel tank, reinforcement (15) comprises carbon fibers, the matrix (17) comprises a structural member using a carbon fiber reinforced plastic comprising a plastic matrix (17) is electrically conductive property is imparted. Then, inside the fuel in the fuel tank is accommodated, cutting surface of the structural member structural member is formed by cutting (11a) may be exposed.