A multi-chamber container which is improved in the bonding strength of weaklysealed parts, facilitates opening in preparation for administration, and isinexpensive. The multi-chamber container comprises a drug reservoir chamber(1), a diluent chamber (3) connected to one end side of the chamber (1) througha weakly sealed part (2) for partition, and an empty chamber (5) which has a mouthpart (6) and is connected to the other end side of the drug reservoir chamber (1)through a weakly sealed part (4) for discharge, wherein the drug reservoir chamber(1) has, bonded thereto, a filmy material (7) for improving the bonding strengthin the weakly sealed part (2) for partition and in the weakly sealed part (4) fordischarge, and the weakly sealed part (4) for discharge partly has an easy-to-openpart (8) at which opening is easy.
