The present invention provides a new infusion bag that is easy to handle even if a long hanging string is used, allows easy infusion, and prevents the hanging string from being caught in a seal part during individual-package sealing. Said infusion bag (1) is provided with the following: a bag part (2) that contains the substance to be used to produce an infusion and a hanging string (3), the tip of which is affixed to a tag (5) for holding the infusion bag and the base end (3a) of which is affixed to the surface (4) of the bag part (2). This infusion bag is characterized by a structure wherein: the hanging string (3) is coiled into a spiral and disposed on the surface (4) of the bag part (2) and the tag (5) is detachably affixed to the surface (4) of the bag part (2) so as to cover the hanging string (3).
