A pouch container provided with a storage space for storing contents and a gas filling space that is a space different from the storage space inside the pouch container, the pouch container comprising: a first wall section and a second wall section having a sheet-like shape and defining the storage space; and a seal portion formed by overlapping and joining an edge portion of the first wall section and an edge portion of the second wall section, and configured to seal the storage space from outside, wherein at the edge portion of the first wall section and the edge portion of the second wall section at a portion where the seal portion is formed, a gas injection portion having a projection shape and formed with an injection port communicating with the gas filling space is provided, the first wall section includes a first tongue-shaped portion projecting outward from the edge portion of the first wall section at the portion where the seal portion is formed, the second wall section includes a second tongue-shaped portion projecting outward from the edge portion of the second wall section at the portion where the seal portion is formed and overlapping the first tongue-shaped portion, and the gas injection portion is formed by the first tongue-shaped portion and the second tongue-shaped portion by joining both end portions of both the first tongue-shaped portion and the second tongue-shaped portion that overlap each other in a width direction of the gas injection portion, and the injection port is defined by a tip end portion of the first tongue-shaped portion in the projection direction and the second tongue-shaped portion at a portion facing the tip end portion, characterised in that a projection length of the second tongue shaped portion is longer than a projection length of the first tongue shaped portion. a first wall section and a second wall section having a sheet-like shape and defining the storage space; and a seal portion formed by overlapping and joining an edge portion of the first wall section and an edge portion of the second wall section, and configured to seal the storage space from outside, wherein at the edge portion of the first wall section and the edge portion of the second wall section at a portion where the seal portion is formed, a gas injection portion having a projection shape and formed with an injection port communicating with the gas filling space is provided, the first wall section includes a first tongue-shaped portion projecting outward from the edge portion of the first wall section at the portion where the seal portion is formed, the second wall section includes a second tongue-shaped portion projecting outward from the edge portion of the second wall section at the portion where the seal portion is formed and overlapping the first tongue-shaped portion, and the gas injection portion is formed by the first tongue-shaped portion and the second tongue-shaped portion by joining both end portions of both the first tongue-shaped portion and the second tongue-shaped portion that overlap each other in a width direction of the gas injection portion, and the injection port is defined by a tip end portion of the first tongue-shaped portion in the projection direction and the second tongue-shaped portion at a portion facing the tip end portion, characterised in that a projection length of the second tongue shaped portion is longer than a projection length of the first tongue shaped portion.