Fuel cell coupler and fuel cell using the same

A fuel cell coupler, comprising:

• a nozzle part provided on a fuel cartridge, the nozzle part including a valve mechanism;
• a socket part provided in a fuel cell body, the socket part including a valve mechanism and adapted to be coupled detachably to the nozzle part;
• a guide groove formed in one of the nozzle part or the socket part;
• and
• a key section formed in the other one of the nozzle part or the socket part and adapted to engage with the guide groove so as to guide coupling of the nozzle part to the socket part,
• wherein the guide groove is formed in a resin part and deforms so that the nozzle part detaches from the socket part when a bending load is applied to the fuel cartridge coupled to the fuel cell body.