Forty crossbred pigs of an initial body weight of about 14 kg were divided into 4 groups and placed in individual pens. The control animals (group K) were fed ad libitum a mixture containing soyabean meal (SBM), whereas in the case of diets fed to experimental groups, 25% (group 1), 50% (group 2) and 75% (group 3) of the soya protein was replaced by the protein of faba bean cv. Kodam. Diets were balanced on the basis of apparent ileal amino acid digestibility. The experiment ended when the animals reached a body weight of 36 kg. The average daily gain (ADG) of animals from the control group was 586 g, the feed:gain ratio (F/G) was 2.59 kg. In the experimental groups, the ADG was: 577 g (group 1), 629 g (group 2) and 637 g (group 3) and F/G was: 2.35, 2.28 and 2.17 kg/ kg, respectively. In comparison with the control group, the feed conversion ratio was significantly better (P<0.05) in groups 2 and 3 than in groups K and 1.