An environment friendly and inexpensive gas barrier film that allows a medicine to be clearly visible from outside and prevents erroneous administration is provided. A multichamber bag having a diluting solution chamber 3 jointed to one end side of a medicine-accommodation chamber 1 via a weak sealing part 2 and an unoccupied chamber 5 having an opening part 4 jointed to the other end side of the medicine-accommodation chamber 1 via a weak sealing part 2, wherein the medicine-accommodation chamber 1, the diluting solution chamber 3 and the unoccupied chamber 5 are made of a transparent film material and the outside of the medicine-accommodation chamber 1 is covered with a transparent gas barrier film 6, is provided.本發明提供一種可自外部明確地目測藥劑,從而不會產生錯誤投與,且防止污染性良好之廉價多腔袋。其係於藥劑收容腔1之一端側經由弱密封部2連接設置稀釋液腔3,另一方面於上述藥劑收容腔1之另一端側經由弱密封部2連接設置具有口部4之空腔5之多腔袋,藥劑收容腔1、稀釋液腔3及空腔5由透明之薄膜材料構成,且,藥劑收容腔1之外側以透明之阻氣膜6加以覆蓋。1‧‧‧藥劑收容腔2‧‧‧弱密封部3‧‧‧稀釋液腔4‧‧‧口部5‧‧‧空腔6‧‧‧阻氣膜7‧‧‧懸掛孔
