The invention relates to a container containing a concentrate for dialysis, which container comprises: - a pouch or a cartridge containing a solid concentrate of constituents of the composition of the dialysis solution, the pouch or the cartridge being closed by - a connector provided with - a filling channel extending completely through the connector, intended for filling the pouch or the cartridge with the solid concentrate, - means for introducing a solution-forming liquid into the pocket or the cartridge and for extracting the solution obtained from the pouch or the cartridge, these introduction and extraction means being provided with at least one connecting portion for connecting them to a corresponding port of the dialysis machine. The container of the invention is characterized in that the filling channel is closed by a stopper equipped with - a reservoir containing a second constituent or group of constituents of the composition of the dialysis solution, and - means (131) for producing an outlet opening in the reservoir contacting the inside of the reservoir with the side of the stopper located in the container.本發明係關於一種含有用於透析之濃縮物的容器，該容器包含：- 一囊袋或一匣體，其含有透析溶液的組成物之成分的固體濃縮物，該囊袋或該匣體係由一連接器封閉，- 該連接器，其具備- 一填充通道，其延伸而完全穿過該連接器，意欲用於用該固體濃縮物來填充該囊袋或該匣體，- 用於將溶液形成液體引入至該小袋或該匣體中之構件及用於自該囊袋或該匣體抽出所獲得之溶液的構件，此等引入及抽出構件具備至少一個連接部分以用於將其連接至透析機器之一相應端口。本發明之容器特徵在於：該填充通道由一塞子封閉，該塞子配備有：- 一儲集器，其含有透析溶液的組成物之一第二成分或第二群成分，及- 用於在該儲集器中產生一出口開口，從而使該儲集器之內側與該塞子之位於該容器中之側接觸的構件(131)。
