NOVELTY - A high-pressure tank (1) comprises cap (11); liner (20); and reinforced layer (21) that is provided on the liner, where the liner includes gas barrier layer formed on at least one of the outer surface and the inner surface of the liner, and first layer that is formed from material different from the gas barrier layer.    USE - As high-pressure tank for hydrogen used as fuel supply source in a fuel cell system (claimed).    ADVANTAGE - The high-pressure tank reduces an amount of hydrogen that permeates through liner without adopting structure in which metal layer is formed on the inner surface of the liner. Following the formation of the first layer of the liner, the gas barrier layer can be formed without releasing the first layer of the liner from the male mold. Thus, it is possible to manufacture the high-pressure tank in which gas permeation through the liner is prevented. In addition, by sharing the male mold to form the two-layered liner, it is possible to simplify processes, reduce process time, and reduce cost.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) manufacturing high-pressure tank involving injecting resin into a forming mold that includes male mold and first female mold, and forming a first layer of a liner; removing the first female mold to replace it with a second female mold and injecting resin with gas barrier property to form gas barrier layer on the outer surface of the first layer so as to make a two-layer structure; welding the liners to each other after the two-layered liner is release from the mold; and heating and curing the welded liners after filament winding molding;    (2) manufacturing equipment of a liner, comprising male mold to form the liner; first female mold that creates a space to form a first layer of the liner between the male mold and the first female mold; and second female mold with which the first female mold is replaced after the first layer is formed, and that creates a space to form a gas barrier layer on an outer surface of the first layer.    DESCRIPTION OF DRAWING(S) - The figure shows cross sectional view of high-pressure tank.    High-pressure tank (1)    Fuel cell (2)    Cap (11)    Liner (20)    Reinforced layer (21)