Provided is a stacked body including: a fiber substrate layer that contains first fibers； and a fiber assembly that is stacked on the fiber substrate layer, wherein the fiber assembly includes: second fibers that contain a water-soluble first component as a main component and particulates that contain a second component that is capable of forming a hydrogel, and in a case where the second fibers contain the second component, a mass proportion of the second component contained in the particulates is greater than a mass proportion of the second component contained in the second fibers, and an average fiber diameter D1 of the first fibers and an average fiber diameter D2 of the second fibers satisfy the relationship: D1>；D2. With the stacked body, embedment of the particulates into the fiber substrate layer is suppressed, and a large number of particulates can be laid in an exposed state.
