A fuel container holding structure for detachably holding a fuel container 40 including a nozzle 44 in its front end portion is provided with a front end holding portion 22 for holding the front end portion of the fuel container 40 and a rear end holding portion 28 for holding a rear end portion of the fuel container 40. The front end holding portion 22 includes a connecting portion 23 to which the nozzle 44 is connected and a buffer mechanism 25, 42 disposed between the connecting portion 23 and fuel container 40. The fuel container 40 is supported by the buffer mechanism 25, 42.