Autoinjector comprising an outer shell (1022), a reservoir containing fluid and comprising a piston and a needle, such as a pre-filled syringe (A), said autoinjector comprising a piston rod (1005) adapted to cooperate with the piston of said reservoir, said piston rod (1005) being movable between a loaded position and an injection position in which said piston rod (1005) has moved the piston of the reservoir to inject the fluid through the needle, a an injection spring (1008) being provided for urging said piston rod (1005) towards its injection position, the autoinjector including a movable member (1004； 1006), at least partially containing said piston rod (1005) and said injection spring (1008), said piston rod (1005) being movable with respect to said movable member (1004； 1006) during the injection phase, said autoinjector including an audible indication device and / or touch panel (1500) having a key (1120), said key having a rod portion (1120) extending inside the piston rod (1005), and a head portion (1122), said movable member having at least one deformable tab (1510； 1520), said head portion (1122) of said key (1120) cooperating prior to injection with said at least one deformable tab (1510； 1520) to prevent any radial deformation thereof, blocking said movable member (1004； 1006) with respect to said outer shell (1022), said piston rod (1005), at the end of injection, exerting via said shaft portion (1121) of said key (1120) traction on said head portion (1122) of said key (1120) causing said key (1120) to move relative to said at least one deformable tab (1510； 1520), thereby allowing radial deformation of said at least one deformable tab (1510； 1520) and a displacement axial of said movable member (1004； 1006) under the effect of said injection spring (1008), said displacement generating a sound and / or tactile indication for the user.Autoinjecteur comportant une coque externe (1022), un réservoir contenant du produit fluide et comportant un piston et u
