Fuel tank for vehicle

In a fuel tank for vehicle in which a lower opening part of a fuel supply guide tube is covered with a flame arrester, to enable a fuel to be extracted via a fuel supply port. In the fuel tank for vehicle (726) provided with a fuel supply port device (740), the fuel supply port device (740) includes an insertion hole (745) through which the inside of the fuel supply port device (740) and the inside of a tank body communicate with each other and through which a tool (hose H) for extracting the fuel is inserted, and an open-close lid (746) for opening and closing the insertion hole (745).