A safety device (30) for a medicament container (20) comprising: a first sheath (31) having a first flange (35) and a second flange (36)； a second sheath (32) telescopically arranged with the first sheath and coupled so that it can be released to the first flange (35)； and a finger flange (50, 500) having at least one elastic clip (72) adapted to be applied to the second flange (36) of the first sheath (31), characterized in that the elastic clip (72) comprises a transverse beam (72.1) extending in a radial direction (I) inwards, a longitudinal beam (72.2) extending from the transverse beam (72.1) in a proximal direction (P), a hook comprising an inclined surface (72.3) and a block surface (72.4) extending from the longitudinal beam (72.2) in the radial direction (I) inwards, where during the insertion of the second flange (36) in a distal direction (D) the second flange ( 36) is applied to the inclined surface (72.3) by increasingly deflecting the elastic clip (72) in a radial direction (O) outwards, where, after the second flange (36) has passed the inclined surface (72.3 ) the elastic clip (72) relaxes and the second flange (36) is applied to the surface block icie (72.4) preventing the second flange (36) from returning in the proximal direction (P).Un dispositivo de seguridad (30) para un recipiente (20) de medicamentos que comprende: una primera funda (31) que tiene un primer reborde (35) y un segundo reborde (36)； una segunda funda (32) dispuesta telescópicamente con la primera funda y acoplada de forma que se pueda liberar al primer reborde (35)； y una pestaña (50, 500) para dedos que tiene al menos un clip elástico (72) adaptado para aplicarse al segundo reborde (36) de la primera funda (31), caracterizado por que el clip elástico (72) comprende una viga transversal (72.1) que se extiende en una dirección (I) radial hacia dentro, una viga longitudinal (72.2) que se extiende desde la viga transversal (72.1) en una dirección proximal (P), un gancho que compren
