This invention from offers the medicine packing sack or the packing material which is superior in long-term conservation. As for this invention, in detail, at least moisture transmitted layer, moisture absorption layer and cover layer being laminated by order, being the packing material which becomes,(1) the aforementioned moisture absorption layer is formed by the moisture absorbent and the 1st composition which includes the resin component,(2) the aforementioned moisture transmitted layer is formed by the 2nd composition which includes the resin component,(3) the aforementioned 1st composition 15 - 60 weight % contains the moisture absorbent,The packing material which features thing is offered.本発明は、より長期保存性に優れた薬剤包装袋あるいは包装材を提供する。本発明は、詳細には、少なくとも水分透過層、吸湿層及び遮蔽層が順に積層されてなる包装材であって、(1)前記吸湿層は、吸湿剤及び樹脂成分を含む第1組成物により形成され、(2)前記水分透過層は、樹脂成分を含む第2組成物により形成され、(3)前記第1組成物は、吸湿剤を15~60重量%含有する、ことを特徴とする包装材を提供する。
