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 (210, 210) 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 (210, 210) 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.