Device for injecting bone cement comprising a reservoir (1) which is intended to receive said bone cement, having a first end (17) comprising an outlet orifice for injection of cement and a second end (18 ) receiving a piston (2) which can effect a movement of longitudinal translation inside the reservoir body, putting moving said piston (2) by means of an injection screw (5) projecting out of the tank body and being subject with gripping means (6) suitable for contact integrally with the tank (1), characterized by comprising means for rotating the injection screw (5) capable of autobloquearse function of the pressure exerted on the inside of the container body, said driving means comprising rotating injection screw a handle (13) provided with a passage that receives the t ornillo injection (5) and which is linked to it by means of a pair of male / female discs being secured one of the two discs, called actuator disc (12), the rotational movements of the handle (13) and suitable to perform a translatory movements in the longitudinal axis of the passage of the handle, being integral the other disc, called driven disk (11), the rotational movements of the injection screw (5), coming to contact the actuator disk ( 12) with the driven (11) by the effect of a compressive force exerted on the distal portion (19) of the injection screw (5) disk.Dispositivo para la inyección de un cemento óseo que comprende un depósito (1) que tiene por objeto recibir dicho cemento óseo, dotado de un primer extremo (17) que comprende un orificio de salida para la inyección del cemento y de un segundo extremo (18) que recibe un pistón (2) que puede efectuar unos movimientos de traslación longitudinal en el interior del cuerpo del depósito, poniéndose en movimiento dicho pistón (2) por medio de un tornillo de inyección (5) que sobresale fuera del cuerpo del depósito y estando sujeto con unos medios de prensión (6) adecuados para ponerse en contacto de manera solidaria con el depósito (1), car
