A pouch comprising: a bag including an internal space for accommodating a content and a first opening , the bag being adapted to place the content in the internal space through the first opening; and a fastener for opening and closing the first opening, including a female track and a male track , the female track including a female track base and a female track main portion , the male track including a male track base and a male track main base , wherein the male track base is thermally welded to one sheet forming the bag and the female track base is thermally welded to another sheet forming the bag , the bag further includes a second opening and is adapted to place the content in the internal space through the second opening, the bag further includes an easily-openable sealing portion for opening and closing the first opening, the easily-openable sealing portion is formed between the fastener and the internal space in the first opening and is configured to seal the two sheets forming the bag body, the easily-openable sealing portion includes a main portion and a bag sealing portion , and functions to suppress contents in the internal space from adhering to the fastener , characterized in that the main portion is made of the same material as the material for the female track base of the fastener , and is integral with the female track base , and is made of the same material as the material for the bag sealing portion , and is integral with the bag sealing portion , and the bag sealing portion is sealed to the inner circumferential surface of the one sheet, and is not integral with the male track base . a bag including an internal space for accommodating a content and a first opening , the bag being adapted to place the content in the internal space through the first opening; and a fastener for opening and closing the first opening, including a female track and a male track , the female track including a female track base and a female track main portion , the male track including a male track base and a male track main base , wherein the male track base is thermally welded to one sheet forming the bag and the female track base is thermally welded to another sheet forming the bag , the bag further includes a second opening and is adapted to place the content in the internal space through the second opening, the bag further includes an easily-openable sealing portion for opening and closing the first opening, the easily-openable sealing portion is formed between the fastener and the internal space in the first opening and is configured to seal the two sheets forming the bag body, the easily-openable sealing portion includes a main portion and a bag sealing portion , and functions to suppress contents in the internal space from adhering to the fastener , characterized in that the main portion is made of the same material as the material for the female track base of the fastener , and is integral with the female track base , and is made of the same material as the material for the bag sealing portion , and is integral with the bag sealing portion , and the bag sealing portion is sealed to the inner circumferential surface of the one sheet, and is not integral with the male track base . <EOS>