Labelling device (1) for syringes for pharmaceutical products which comprises a carousel (10) having means for holding and transporting syringes, a syringe labelling station, a syringe handler (40) for holding a syringe to be labelled in front of the labelling station, means (60) for detecting the position of the marker scale of the syringes, wherein the syringe labelling station comprises an arm (21) responsible for holding the label by means of a suction system and two articulated gates (31, 32, 31', 32') arranged such that when the handling means cause the syringe to pass therethrough, said gates apply pressure over the body of the syringe in such a way that the label is affixed uniformly over said body.