A scraper device (10) for a reciprocating compressor piston rod (11) comprises at least one scraper ring (12, 12null), provided with at least one lip (27, 28) which faces the surface of the said rod (11), and a box (13) to contain the scraper ring (12) and for centring on the rod (11), wherein this scraper ring (12) is produced by means of mechanical processing of deformable plastics materials and wherein this container box (13) is accommodated in support elements (14) with radial play (34).