Plastic container

A plastic container comprising:

• a bag body which is formed into a bag shape by a sheet member and has a storage part on the inside thereof;
• and at least one tubular port member attached to said bag body, in which one end of the tubular port member communicates with the storage part and an opening part of the other end is exposed outside of the bag body,
• wherein said sheet member is formed from two or more layers including a base resin layer and an innermost layer, and said innermost layer is formed from an amorphous polymer, as a main component, formed by polymerizing at least one type or two or more types of olefin monomers, in which at least one type of said olefin monomers is a monomer having a cyclic hydrocarbon skeleton,
• wherein said port member is formed from a resin having a crystalline polyolefin having no cyclic hydrocarbon skeleton, as a main component;
• and
• wherein a relationship between a total content contact area SB (cm2) of said bag body and a total content contact area SP (cm2) of said port member satisfies the following (Expression 1):
• 0.01≤SP/SB≤0.15 (Expression 1).