Patent ID: 7971740

Claim:
A pressure vessel comprising: a plurality of vessel structures arranged and integrated with each other, the vessel structures each comprising a cylindrical liner having at least one open end thereof and a fiber reinforced resin layer covering an outer periphery of a peripheral wall of the liner, wherein interiors of the liners of all the vessel structures are put in communication with each other, the liners of all the vessel structures form a single closed space, the pressure vessel has a mouth portion for making the closed space communicate with exterior, all the vessel structures are positioned such that the open ends of the liners thereof fall on a same side, an end plate is stationary across the open ends of the liners of all the vessel structures, the end plate is made of a single flat plate having a plurality of through holes into which the open ends of the liners are to be fitted, the open ends of the liners are fitted into the through holes, respectively, the plate and the liners are joined at portions around the through holes of the plate and the open ends of the liners, and a rim portion on an open side of a dome-shaped communicating member bulging outward is joined to a rim portion of the end plate such that the interiors of the liners are communicated with each other and the opening of the liners are closed.