İn our hemodialysis center, serum Lipoprotein (a) {Lp(a)j, Apoprotein Ai (ApoAi) and Apoprotein B (Apo B) levels were examined in 50 patients and 50 healthy controls. Of the parameters investigated by means of the nefelometer method Lp (a) was found to be high in 38% of hemodialysis patient (18 cases) and 26% of the control group (13 cases). However, there was no statistically significant difference. Serum Apo Al and Apo B levels were significantly lower in patients compared with the control group (p<0.0001). Consequently, it may be said that determination ofLp (a) level, one of the atheronegic risk indicators, may produce useful results in clinical practice.