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 . <EOS>