The experiment was carried out at the experimental station of the faculty of Agriculture Al-Azhar University, Cairo Egypt, to evaluate the grape pressing by-products as a unconventional feed stuff in rations of growing ossimi lambs. A feeding trial of 16 weeks period was carried out with 12 growing ossimi lambs aging 7-8 months and weighing 25.4 kg on the average. The experimental lambs were devided into three groups 4 animals each to represent three nutritional treatments. The first group (G₁) control was offered a complete concentrate feed mixture (G₁). While the other two groups (G₂,G₃), were fed concentrate feed mixture plus 15% grape pressing by-products (G₂) and the second was offered the  feed mixture plus 30% grape pressing by-products (G₃) respectively. The bean straw was offered ad-libitum, while concentrated feeds were fed at a rate of 3%  of LBW to the three groups. Three digestibility trails were carried out at the end of the feeding trial to evaluate the three rations. Results obtained can be summarized as follows : 1)      There were no significant differences among the groups fed diets containing grape pressing by-products is final weight, total gain and daily gains. 2)      Conversion of TDN and DCP calculated as kg required for each kg live weight gain were found to be 7.62, 7.38, 6.67 and 1.20, 1.18 and 1.12 for the groups G₁, G₂ and G₃ respectively. 3)      The highest feed costs for each kg live weight gain were recorded by the G₁, followed by G₂, and G₃ groups; respectively. 4)      Treatments applied showed no significant effects on digestibities of DM; OM; CP; CF; EE and NFE.. Further investigation on grape pressing by- products are required especially on the area of treatment of this feed stuff to get red of the tannines presented in it (3-7% of the DM) Also applications of this feed stuff should be studied on the large scale in the practice .