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 external body (220) having a fastening part (228) fixed on said injection device (100) and a protection part (229) fixed on said internal body (210) said protection part (229) being connected to said fastening part (228) by at least one bridge (227) of divisible material said at least one bridge (227) of divisible material being broken in order to withdraw said protection part (229) and said internal body (210) from said injection device (100).
