This study was carried out to investigate the effects ol aflatoxın and adsorbent (Mycofix^® Plus, based polyvmıyllpolypyrrolidone active matter) on some perfonnance para^ters of day-old broiler chicks. A total of 132 chicks (Hybro) were divided into four groups each containing 33 animals. lt was mixed into diets at 0, 3, 0, 3 g/kg Mycofix^®. Plus and 0, 0, 2.5, 2.5 ppm aflatoxin. Feed and drinking water was provided ad libitum for 21 days. Feed consumption, body weight were determined every 7 days. Died animals were recorded daily Feed consumption (gl day) was 23.6, 24.7, 17 . 1, and 21.6; final body weights were (g) 346.3; 275.5; 235.0 and 241.4 respectively. Alatoxin (83.06% B₁, 12.98% B2. 2 84% G₁. and 1.12% G₂) was produced by Aspergillus parasiticus NRRL 2999 at "University of Selçuk, Faculty of Veterinary Medicine. Dept. of Pharmacology and Toxicology." Based on results, although there is a significant difference (p<0.05), between control and the other groups on body weight and no significant differences between the others (p>0.05). However, feed consumption was highly reduced in aflatoxin group.