Blood collection device, comprising: a cannula bushing (10) defining a chamber (28)； a cannula (56) defining an axis and having a distal end, a proximal end and a light extending therethrough, the cannula (56) being mounted on the cannula bushing (10) so that the distal end and the proximal end of the cannula (56) are external to the cannula bushing (10) and so that the light through the cannula (56) communicates with the chamber (28) by means of an opening (58 )； a closed sheath (34) mounted on a part (32) of the cannula (56) disposed outside the cannula bushing (10)； and an aeration mechanism (38) that provides communication between the chamber (28) and the environmental environment, the aeration mechanism (38) comprising a tubular insert (40) defining a fluid passage (42) therethrough and a membrane (44) that extends through the fluid passage (42), the membrane (44) being made from an air-permeable and substantially impervious to blood material, characterized in that the tubular insert (40) is received on a tubular shoulder (50) extending from the cannula bushing (10) so that the end of the tubular insert (40) facing the flashback chamber (28) abuts on an inner collar (54) When the tubular insert (40) is fully inserted inside the tubular shoulder (50), the inner collar (54) being provided in the transition zone from the tubular shoulder (50) to the flashback chamber (28), the cannula bushing (10) consists of a first and second pieces (16, 18), the first part (16) comprises a grip part (20) and a tubular part (22) extending proximally therefrom in the direction of the cannula shaft, and the second part (18) has a shape generally tubular and is partially received in the tubular part (22) of the first piece by means of a snap fit.Dispositivo de recogida de sangre, que comprende: un buje de cánula (10) que define una cámara (28)； una cánula (56) que define un eje y que presenta un extremo distal, un extremo proximal y una luz que se extiende a través de la misma, est
