The invention relates to an autoinjector comprising a body (1) with an approximately cylindrical general shape that is capable of housing a reservoir containing a fluid product and comprising a plunger (P) and a needle, such as a pre-filled syringe, said body (1) comprising a distal portion, a median portion and a proximal portion, a removable cap (20) being secured, prior to the use of the autoinjector, to said proximal portion of said body (1), wherein said median portion of said body (1) has an approximately cylindrical general shape and comprises first anti-rolling means (125), such as at least one radial projection, forming at least one non-cylindrical median area in the outer profile of said median portion of said body (1)； and said removable cap (20) has an approximately cylindrical general shape and comprises second anti-rolling means (21) forming at least one non-cylindrical proximal area in the outer profile of said removable cap (20)； and/or said distal portion of said body (1) has an approximately cylindrical general shape and comprises third anti-rolling means (115), such as at least one radial projection, forming at least one non-cylindrical distal area in the outer profile of said distal portion of said body (1).Autoinjecteur comportant un corps (1) de forme générale environ cylindrique adapté à recevoir un réservoir contenant du produit fluide et comportant un piston (P) et une aiguille, tel qu'une seringue pré-remplie, ledit corps (1) comportant une partie distale, une partie médiane et une partie proximale, un capot amovible (20) étant fixé, avant utilisation de l'autoinjecteur, à ladite partie proximale dudit corps (1), dans lequel - ladite partie médiane dudit corps (1) est de forme générale environ cylindrique et comporte des premiers moyens anti-roulement (125), tels qu'au moins une projection radialement saillante, formant au moins une zone non cylindrique médiane dans le profil externe de ladite partie médiane dudit corps (1), et - ledit capo
