A pouch comprising: two sheets (11, 12) placed one upon another; a seal including a first seal portion and a second seal portion, wherein the first seal portion extends along an edge of the two sheets (11, 12) and seals the two sheets (11, 12) together to form an accommodation cavity between the two sheets (11, 12) that allows for accommodation of contents, and the second seal portion is shaped to be depressed toward the accommodation cavity; and a non-sealed portion that is a portion in the two sheets (11, 12) surrounded by the second seal portion and not sealed, wherein the second seal portion includes a distal end portion and a connection portion, the distal end portion is configured to be ripped by stress concentration that occurs when steam generated from the contents raises pressure of the accommodation cavity, the connection portion is configured to connect the distal end portion and the first seal portion, the connection portion includes a first connection portion and a second connection portion, the first connection portion is configured to connect a first end of the distal end portion and a first end of the first seal portion, and the second connection portion is configured to connect a second end of the distal end portion and a second end of the first seal portion, one of the first connection portion and the second connection portion includes a ripping restriction portion (61, 70) configured to restrict ripping of the second seal portion that progresses from the distal end portion toward the first seal portion, the ripping restriction portion (61, 70) including a part having a larger seal width than the distal end portion, characterised in that the other one of the first connection portion and the second connection portion does not include a ripping restriction portion (61, 70). two sheets (11, 12) placed one upon another; a seal including a first seal portion and a second seal portion, wherein the first seal portion extends along an edge of the two sheets (11, 12) and seals the two sheets (11, 12) together to form an accommodation cavity between the two sheets (11, 12) that allows for accommodation of contents, and the second seal portion is shaped to be depressed toward the accommodation cavity; and a non-sealed portion that is a portion in the two sheets (11, 12) surrounded by the second seal portion and not sealed, wherein the second seal portion includes a distal end portion and a connection portion, the distal end portion is configured to be ripped by stress concentration that occurs when steam generated from the contents raises pressure of the accommodation cavity, the connection portion is configured to connect the distal end portion and the first seal portion, the connection portion includes a first connection portion and a second connection portion, the first connection portion is configured to connect a first end of the distal end portion and a first end of the first seal portion, and the second connection portion is configured to connect a second end of the distal end portion and a second end of the first seal portion, one of the first connection portion and the second connection portion includes a ripping restriction portion (61, 70) configured to restrict ripping of the second seal portion that progresses from the distal end portion toward the first seal portion, the ripping restriction portion (61, 70) including a part having a larger seal width than the distal end portion, characterised in that the other one of the first connection portion and the second connection portion does not include a ripping restriction portion (61, 70).