A multiple-chamber medical container 1 comprises a container body 5 having two chambers 9, 11 for containing medicaments therein and a partitioning weak seal portion 13 for separating the chambers 9, 11 from each other, a medicinal outlet portion 7 attached to the container body 5 for discharging the medicaments from the chambers therethrough, and an openable small container 15 disposed in the first chamber 9 and having a medicament enclosed therein, the partitioning seal portion 15 being openable so as to cause the chambers 9, 11 to communicate with each other for use. The small container 15 can be opened by opening the partitioning weak seal portion 13.