Patent ID: 7943884

Claim:
A method of producing a gas container having a resin liner constituted by joining a plurality of liner constituting members, the liner constituting members each having at least a tubular part, the method comprising: providing the plurality of resin liner constituting members, the plurality of resin liner constituting members including a first liner constituting member having a first joining portion and a second liner constituting member having a second joining portion, the first joining portion having an inward chamfered first joining end surface, and a first extending portion extending externally from a tip end portion of the first joining end surface, the second joining portion having a second joining end surface externally chamfered along the first joining end surface; a first step of constituting the first joining end surface by a laser transmitting member and constituting the second joining end surface by a laser absorbing member; a second step of bringing the first joining end surface into contact with the second joining end surface and bringing the first extending portion into contact with an outer peripheral surface of the second joining portion after the first step; and a third step of irradiating the liner constituting members with laser from a side of the first joining portion to join the first joining end surface and the second joining end surface by laser welding which are brought into contact with each other after the second step; and a step of shaving the first extending portion so that joints of outer peripheral surfaces of the first and second liner constituting members have the same plane after the third step.