An injection device is disclosed, the device having a proximal end and a distal end, wherein the distal end is located closest to an injection site In use, the device comprising: a container a septum sealing a distal end of the container and a needle located distal to the container wherein the container comprises a first chamber including a first component and a second chamber including a second component, the first and second chambers being initially separated from one another by a seal to prevent mixing of the first and second components, wherein the device is arranged on activation to provide a septum piercing stage and then a mixing stage and wherein the septum piercing stage is a stage in which the needle is caused to pierce the septum to place the needle in fluid communication with the interior of the container, and the mixing stage is a stage in which the seal between the first and second chambers is breached to permit fluid communication between the first and second chambers to allow the first and second components to mix thereby providing a composition comprising the first and second components for injection. A transition between the septum piercing stage and the mixing stage is controlled by the rotational movement of a part of the device.Linvention porte sur un dispositif dinjection, lequel dispositif a une extrémité proximale et une extrémité distale, lextrémité distale étant située au plus près dun site dinjection, lors de lutilisation, lequel dispositif comprend : un récipient une membrane scellant hermétiquement une extrémité distale du récipient et une aiguille située de façon distale vis-à-vis du récipient le récipient comprenant une première chambre comprenant un premier composant et une seconde chambre comprenant un second composant, les première et seconde chambres étant initialement séparées lune de lautre par un joint détanchéité afin dempêcher un mélange des premier et second composants, le dispositif étant agencé, lors de lactionnement, af
