This syringe (1) comprises an elongate hollow body (3) forming a reservoir intended to contain a substance to be injected, the body (3) comprising a tip intended to receive a connection device and an opening (32) located at the opposite side of the body (3) relative to the tip, a piston mounted sliding in the body (3) and movable in translation along a longitudinal axis (X3) of the syringe between a retracted position, in which the piston is in abutment at the tip side, and an extended position, in which the piston is in abutment at the opening side (32), gripping members (34, 36) provided on the body (3), and a gripping member (50) provided at an opposite end of the piston relative to a head of the piston. The gripping members (34, 36) provided on the body (3) comprise bearing areas (34a, 36a) for fingers of a user, oriented towards the gripping member (50) of the piston, and the gripping member (50) of the piston comprises at least one bearing area for fingers of the user, located facing the gripping members (34, 36) provided on the body (3). The piston (5) is formed from a single piece made from a material having a Young's modulus greater than 3000 MPa and the piston (5) has no elastic area between the gripping member (50) of same and the substance to be injected.Esta jeringa (1) comprende un cuerpo hueco alargado (3) que forma un depósito destinado para contener una substancia a inyectar, el cuerpo (3) que comprende un elemento tubular destinado para recibir un dispositivo de conexión y una abertura (32) situada en el lado opuesto al cuerpo (3) con relación al elemento tubular, un émbolo montado de forma deslizante en el cuerpo (3) y móvil en translación a lo largo de un eje longitudinal (X3) de la jeringa entre una posición retractada, en la cual el émbolo hace tope por el lado del elemento tubular y una posición extendida, en la cual el émbolo hace tope por el lado de la abertura (32), los órganos de agarre (34, 36) son provistos en el cuerpo (3) y un órgano d
