The invention relates to a carrier for injecting a filler product, in particular for microplasty or lipo-reconstruction, comprising a semi-rigid tubular needle (2) having a longitudinal axis with a closed hemispherical distal end and a proximal end (3) for connecting to an injection device, said needle having an inner tubular surface defining an inner transverse cross-section and an outer tubular surface defining an outer transverse cross-section, wherein at least one output side opening (11) is formed in the needle in the vicinity of the distal end. According to the invention, at least one output side opening (11) is defined by a peripheral edge (12) with a rounded connection profile free of any protruding edge, between the inner and outer surfaces of the needle, and the wall of the needle (1) has a thickness, from the proximal end (3) and over a predetermined length of the needle, which is greater than the thickness of the needle which is constant up to the distal end.