The invention provides a medicament delivery device comprising a housing configured to receive a medicament container having a delivery member and a shield that covers said delivery member, the housing having a longitudinal axis, and comprising first connecting means, a protective cap assembly comprising a protective cap which comprises second connecting means, wherein the first and the second connecting means are configured such that a displacement of the protective cap relative to the housing allows the protective cap to be removed from the housing, and wherein the protective cap further comprises third connecting means for connecting to the shield of the medicament container such that removal of the protective cap from the housing causes removal of the shield from the medicament container, wherein the protective cap assembly further comprises first disconnecting means configured to interact with corresponding second disconnecting means of the housing and of the protective cap such that activation of the first disconnecting means of the protective cap assembly causes the displacement of the protective cap relative to the housing, wherein said first disconnecting means comprises an energy accumulating member, and an activation member configured to energize, upon activation, said energy accumulating member for activation of said first and second disconnecting means.La présente invention concerne un dispositif d'administration de médicament comprenant un boîtier (10 ； 110 ； 210 ； 310 ； 414) conçu pour recevoir un récipient de médicament (16 ； 112 ； 316 ； 452) possédant un élément d'administration (20 ； 114 ； 318 ； 448) et un élément de protection (22 ； 116 ； 320 ； 446), un capuchon de protection (26 ； 26 ； 214 ； 324 ； 428), le capuchon de protection comprenant des moyens d'accouplement (64 ； 140 ； 332 ； 444) destinés à s'accoupler à l'élément de protection du récipient de médicament, de sorte que le retrait du capuchon de protection du boîtier provoque un retrait de
