A medicine bag, which includes a bag body having a medicine storage chamber that stores a medicine in such a way that the medicine is visually confirmed through a light-transmission portion provided in at least one part of the bag body, the bag body having a weak seal portion that divides the medicine storage chamber into a plurality of division spaces, and the sealing of the weak seal portion adjacent to a specific division space being removed by increasing the internal pressure of that division space, including: a cover sheet which is peelably attached to the bag body； and a requisitely-used portion which is used in the process shortly before the medicine is administered, in which the cover sheet includes: a light-shielding portion which shields from the light the medicine stored in at least one division space by covering a predetermined part of the light-transmission portion；and a continuously-formed portion which is continuously formed in the light-shielding portion and is placed so that the requisitely-used portion is prevented from being used with the cover sheet kept attached. <；IMAGE>；
