Device (100) for injection of fluid product having a syringe body (101) and a needle (110) fixed in an axial end projection (102) of the syringe body said injection device having a needle protection device (200) said protection device being fixed on said injection device in a storage position said protection device being removable from said injection device said protection device having an internal body (210) made of substantially flexible or deformable material and an external body (220) made of substantially rigid material said internal body (210) in the storage position closing the dispensing orifice (111) of said needle (110) in a leaktight manner and cooperating with said injection device (100) in a leaktight manner and said external body (220) in the storage position cooperating with said injection device (100) in order to fix said protection device (200) on said injection device (100) said needle protection device having a protection system (300) against accidental pricking said protection system (300) having protection flaps (320) that form an integral part of said external body (220) said protection flaps (320) being movable between a covering position in which they cover the needle (110) and an open position in which the needle is uncovered said protection system (300) additionally having a control ring (310) sliding on said external body (220) in order to move said protection flaps (320) from their covering position to their open position before injection and then from their open position to their covering position after injection.
