Safety needle device comprising: - a hub configured to be connected to a vessel, - a needle attached to the hub, the needle extending along a longitudinal axis (X-X) between a distal end, configured for insertion into a patient, and an opposed proximal end configured to be connected to the vessel, - a shield slidable relative to the hub along the longitudinal axis (X-X) and rotationally constrained around the longitudinal axis (X-X), the shield being configured to irreversibly pass from an initial position, before injection, to a locking position, after injection passing through an intermediate position, by sliding during the injection towards the proximal end of the needle along the longitudinal axis (X-X) from the initial position to the intermediate position and by sliding during extraction towards the distal end of the needle along the longitudinal axis (X-X) from the intermediate position to the locking position; - a housing attached to the hub and surrounding a portion of the hub and a portion of the shield, - an elastic member arranged within the housing and acting on the shield, the elastic member being biased to push the shield towards the distal end of the needle and contrast a longitudinal sliding of the shield towards the proximal end of the needle, - a sleeve arranged within the housing and mounted rotatable around the longitudinal axis (X-X) relative to the shield and the housing, - a locking arrangement comprising at least a first locking member formed on the shield and at least a second locking member formed on the sleeve, the first locking member cooperating with the second locking member to rotate the sleeve upon sliding of the shield and to lock the shield in the locking position, wherein - the shield surrounds at least partially the sleeve, and - the safety needle device comprises a guiding arrangement comprising first guiding members formed on the shield and second guiding members formed on the housing, the first guiding members cooperating with the second guiding member to guide the sliding of the shield along the longitudinal axis (X-X) and to prevent rotation of the shield relative to the housing. - a hub configured to be connected to a vessel, - a needle attached to the hub, the needle extending along a longitudinal axis (X-X) between a distal end, configured for insertion into a patient, and an opposed proximal end configured to be connected to the vessel, - a shield slidable relative to the hub along the longitudinal axis (X-X) and rotationally constrained around the longitudinal axis (X-X), the shield being configured to irreversibly pass from an initial position, before injection, to a locking position, after injection passing through an intermediate position, by sliding during the injection towards the proximal end of the needle along the longitudinal axis (X-X) from the initial position to the intermediate position and by sliding during extraction towards the distal end of the needle along the longitudinal axis (X-X) from the intermediate position to the locking position; - a housing attached to the hub and surrounding a portion of the hub and a portion of the shield, - an elastic member arranged within the housing and acting on the shield, the elastic member being biased to push the shield towards the distal end of the needle and contrast a longitudinal sliding of the shield towards the proximal end of the needle, - a sleeve arranged within the housing and mounted rotatable around the longitudinal axis (X-X) relative to the shield and the housing, - a locking arrangement comprising at least a first locking member formed on the shield and at least a second locking member formed on the sleeve, the first locking member cooperating with the second locking member to rotate the sleeve upon sliding of the shield and to lock the shield in the locking position, wherein - the shield surrounds at least partially the sleeve, and - the safety needle device comprises a guiding arrangement comprising first guiding members formed on the shield and second guiding members formed on the housing, the first guiding members cooperating with the second guiding member to guide the sliding of the shield along the longitudinal axis (X-X) and to prevent rotation of the shield relative to the housing.