The seeds of 6 cultivars of yellow lupin from 7 consecutive harvest years, 1992-1998, were subjected to chemical analysis. The obtained results demonstrate significant differences (P≤0.01 or P≤0.05) between the evaluated cultivars in terms of ether extract, ash and alkaloids. Significant (P≤0.01 or P≤0.05) differences were also found among harvest years in crude fibre and pentosan contents. The highest content of crude protein characterized cultivars Amulet (445 g·kg^-1) and Teo (441 g·kg^-1) and, depending on harvest year, seeds from 1994 (443 g·kg^-1), 1992 (440 g·kg^-1) and 1995 (438 g·kg^-1). Differences in the crude protein content were insignificant.