A bag body having therein restriction yarns for restricting inflation, wherein the restriction yarns comprises: a first yarn (11, 31) extending all across an inside space of the bag body from a non-inflating section to another non-inflating section of the bag body; a second yarn (12, 32) forming a base fabric on one side of an inflating section of the bag body, the second yarn (12, 32) leaving the base fabric on the one side, being caught on the first yarn (11, 31) or constituting a weaving structure with the first yarn (11, 31), and returning to the base fabric on the one side and being woven into the base fabric, wherein a length of the second yarn (12, 32) from leaving the base fabric on the one side to returning to the base fabric on the one side is 10 mm to 200 mm; and a third yarn (13, 33) forming the base fabric on the other side of the inflating section of the bag body, the third yarn (13, 33) leaving the base fabric on the other side, being caught on the first yarn (11, 31) or constituting a weaving structure with the first yarn (11, 31), and returning to the base fabric on the other side and being woven into the base fabric, wherein a length of the third yarn (13, 33) from leaving the base fabric on the other side to returning to the base fabric on the other side is 10 mm to 200 mm, wherein a first restriction yarn group is constituted by the first yarn (11, 31), the second yarn (12, 32), and the third yarn (13, 33), and the first restriction yarn group comprises a first yarn unit that is configured such that two or more second yarns (12, 32) alone are consecutively caught on the first yarn (11, 31) or constitute a weaving structure with the first yarn (11, 31), and a second yarn unit that is configured such that two or more third yarns (13, 33) alone are consecutively caught on the first yarn (11, 31) or constitute a weaving structure with the first yarn (11, 31), and the first yarn unit and the second yarn unit are arranged alternately in an extending direction of the first yarn (11, 31), such that when the bag body inflates the first yarn (11, 31) would be pulled by each of the second yarn (12, 32) and the third yarn (13, 33), thereby forming a wavy line shape within the inside space of the bag body. a first yarn (11, 31) extending all across an inside space of the bag body from a non-inflating section to another non-inflating section of the bag body; a second yarn (12, 32) forming a base fabric on one side of an inflating section of the bag body, the second yarn (12, 32) leaving the base fabric on the one side, being caught on the first yarn (11, 31) or constituting a weaving structure with the first yarn (11, 31), and returning to the base fabric on the one side and being woven into the base fabric, wherein a length of the second yarn (12, 32) from leaving the base fabric on the one side to returning to the base fabric on the one side is 10 mm to 200 mm; and a third yarn (13, 33) forming the base fabric on the other side of the inflating section of the bag body, the third yarn (13, 33) leaving the base fabric on the other side, being caught on the first yarn (11, 31) or constituting a weaving structure with the first yarn (11, 31), and returning to the base fabric on the other side and being woven into the base fabric, wherein a length of the third yarn (13, 33) from leaving the base fabric on the other side to returning to the base fabric on the other side is 10 mm to 200 mm, wherein a first restriction yarn group is constituted by the first yarn (11, 31), the second yarn (12, 32), and the third yarn (13, 33), and the first restriction yarn group comprises a first yarn unit that is configured such that two or more second yarns (12, 32) alone are consecutively caught on the first yarn (11, 31) or constitute a weaving structure with the first yarn (11, 31), and a second yarn unit that is configured such that two or more third yarns (13, 33) alone are consecutively caught on the first yarn (11, 31) or constitute a weaving structure with the first yarn (11, 31), and the first yarn unit and the second yarn unit are arranged alternately in an extending direction of the first yarn (11, 31), such that when the bag body inflates the first yarn (11, 31) would be pulled by each of the second yarn (12, 32) and the third yarn (13, 33), thereby forming a wavy line shape within the inside space of the bag body.