A high-pressure gas container is provided with a hollow liner portion made of resin and a regulating portion disposed on the outer peripheral side of the liner portion. Reinforcing ribs projected toward the hollow inside of the liner portion and used for reinforcing the liner portion are provided integrally with the liner portion on the inner peripheral side of the liner portion. Providing the reinforcing ribs results in increasing the strength of the high-pressure gas container. Moreover, providing the reinforcing ribs integrally with the liner portion makes it possible to reduce not only the number of parts and that of manufacturing man-hours required to produce the high-pressure gas container, so that the high-pressure gas containers are producible less costly.