Fluid dispensing device comprising a body (1) and a dispensing head (2) provided with a dispensing orifice (3) and movable axially with respect to said body (1) during actuation, said body (1) ) receiving a reservoir (10) containing fluid, said reservoir (10) having a hollow tube (11) having a proximal axial opening (12) closed by a stopper (20) adapted to slide tightly into said tube (11)； ) upon actuation, said dispensing head (2) having a hollow cannula (4) connected on one side to said dispensing orifice (3) and provided on the other side with a piercing tip (5) provided with an opening (6) for piercing said plug (20), said cannula (4) being inserted into a cannula holder (9) integral with said dispensing head (2), said cannula holder (9) having a bore axial axis whose internal diameter is equal to or slightly greater than the external diameter ne of said cannula (4), the distal axial end of said cannula holder (9) having a radial projection extending radially inwards, whose internal diameter is equal to or slightly less than the external diameter of said cannula ( 4), the inner diameter of said radial projection being smaller than the internal diameter of said central axial bore. Dispositif de distribution de produit fluide comportant un corps (1) et une tête de distribution (2) pourvue d'un orifice de distribution (3) et déplaçable axialement par rapport audit corps (1) lors de l'actionnement, ledit corps (1) recevant un réservoir (10) contenant du produit fluide, ledit réservoir (10) comportant un tube creux (11) ayant une ouverture axiale proximale (12) fermée par un bouchon (20) adapté à coulisser de manière étanche dans ledit tube (11) lors de l'actionnement, ladite tête de distribution (2) comportant une canule creuse (4) reliée d'un côté audit orifice de distribution (3) et pourvue de l'autre côté d'une pointe de perçage (5) pourvue d'une ouverture (6) pour percer ledit bouchon (20), ladite canule (4) étant insérée dans un support de canule (9)
