The present invention relates to a medicament delivery device comprising a second housing part (21), a plunger rod (25) arranged in said second housing part and configured to act on a stopper arranged inside a multi-chamber container (16)； a first housing part (12) into which said multi-chamber container is arranged, and wherein said first housing part is arranged to be manually displaced into said second housing part by relative rotation between the first and the second housing parts for mixing at least two substances arranged inside said container. The invention is characterised in that said device further comprises a rotating contact element (60) arranged between said plunger rod and said stopper capable of rotating in relation to said plunger rod (25).本發明有關藥物輸送裝置，包含第二外殼部份(21)；柱塞桿(25)，被配置在該第二外殼部份中，且被建構用於作用在多室容器(16)內側所配置的塞子上；第一外殼部份(12)，該多室容器被配置進入其中，且其中該第一外殼部份被配置成藉由該第一及該第二外殼部份間之相對旋轉而手動地位移進入該第二外殼部份，用於混合該容器內側所配置的至少二物質。本發明之特徵在於該裝置另包含旋轉接觸元件(60)，其被配置在該柱塞桿及該塞子之間，而能夠關於該柱塞桿(25)旋轉。
