Synthetic resin-made container, and method of manufacturing synthetic resin-made container

A synthetic resin-made container that has an outer layer body and an inner layer body separably laminated on an inner surface of the outer layer body and is formed by stretch blow molding, the synthetic resin-made container comprising:

• a tubular mouth portion;
• a barrel portion connected to and located below the mouth portion;
• and
• a bottom portion closing a lower end of the barrel portion,
• wherein the outer layer body contains polyethylene terephthalate,
• the inner layer body is made of polyethylene terephthalate, a laminate containing polyethylene terephthalate, or a blend containing polyethylene terephthalate, and has a vapor-deposited film having a gas barrier property on an inner surface thereof,
• a rib that prevents the inner layer body from peeling away from the outer layer body when forming the vapor-deposited film is formed in at least the bottom portion, and
• in a part where the rib is formed, the shape of the inner layer body is a rib shape corresponding to the shape of the outer layer body, and
• wherein the depth of the rib in the vertical direction decreases gradually toward the outer side in the radial direction.