A method of mounting a fuel cartridge on a fuel cell wherein a fuel cartridge containing a methanol solution fuel is mounted on a methanol type fuel cell, wherein a concentration distinguishing member for distinguishing a methanol concentration of a methanol solution fuel contained in the fuel cartridge and a positioning member for positioning upon mounting to a fuel cell are provided at an outer face of the fuel cartridge, and a position fixing member for causing the positioning member to be mounted on a predetermined position and a concentration recognizing member for determining that the fuel supply is allowable when the methanol concentration of the methanol fuel solution is within a predetermined concentration range are provided at the fuel cartridge, wherein, when the fuel cartridge is mounted on the fuel cell, the concentration recognizing member recognizes the concentration distinguish member, whereby the fuel is supplied from the fuel cartridge to the fuel cell.