Infiltration syringe, comprising a plunger (1) with a handle (2) and a tubular casing (3), finished off with a needle connection, in which the plunger (1) slides through a mouth (5) and with first flaps (6) close to the mouth (5), characterized in that it comprises second flaps (7) more distant from the mouth (5) than the first flaps (6). (Machine-translation by Google Translate, not legally binding)Jeringa de infiltraciones, que comprende un émbolo (1) con un asa (2) y una carcasa (3) tubular, rematada en una conexión para aguja, en la que desliza el émbolo (1) a través de una boca (5) y con unas primeras solapas (6) próximas a la boca (5), caracterizada porque comprende unas segundas solapas (7) más distantes a la boca (5) que las primeras solapas (6).