Safety device to protect a medical needle, which has: a gripping element (12)； a cannula (10), which is held in the gripping element (12)； a base (14) with flat wings (18) protruding laterally, the bottom side (19) of the base (14) extending above the wings (18) substantially flat, and presenting the base (14) a guide opening (24) distanced from the lower side (19), in which the cannula (10) is guided； and a joint structure (16), which joins the gripping element (12) with the base (14) and comprises two elongated sections (36； 40) joined in a row with each other by at least one joint (38), the joint structure (16) being joined at one end by at least one joint (42) with the gripping element (12) and at the other end being connected to the base (14) by at least one joint (28, 30 ), the elongated section (36) of the joint structure (16) connected to the base (14) having at least one joint (28, 30) a wall element (34) protruding transversely at its end of the side of the base, and the sections (36, 40) and the joints (28, 30； 38； 42) being arranged so that the joint structure (16) can be deployed from a first state, in which the cannula (10) guided in the guide opening (24) of the base (14) protrudes from the bottom side (19) of the base (14) with the tip (10A), to a second extended state, wherein the cannula (10) is arranged along the joint structure (16), the wall element (34) is arranged transversely in front of the tip (10A) of the cannula (10), and a side wall (32) of the base (14) surrounds protecting the tip (10A) between the guide opening (24) and the wall element (34) and protects it against access.Dispositivo de seguridad para proteger una aguja médica, que presenta: un elemento de agarre (12)； una cánula (10), que está sujeta en el elemento de agarre (12)； una base (14) con unas alas planas (18) que sobresalen lateralmente, siendo el lado inferior (19) de la base (14) que se extiende por encima de las alas (18) sustancialmente plano, y presentando la base (14
