A total of 200 three-way crossbreds (Landrace × Duroc × Large White) were employed to investigate the feeding effect of different level (0%, 1%, 2%., 3%) of hydrolyzed leather meal (HLM) and 2% of fortified leather meal (FLM: as shown in Table 3) to growing-finishing swine for a period of 15 weeks. The results obtained are summarized as follows. 1. Nutrients content of HLM was varied by different sources (makers) of HLM. It was found that the HLM used in feeding experiment contained 75. 21% crude protein, 2.72% chromium and 57.86% pepsin digestibility. Analytical data revealed that HLM contained fairly large amount of glycine, proline, alanine, arginine and contained small amount of other essential amino acids such as methionine and lysine. 2. Experimental results on weight Rain and feed efficiency indicated that optimum using level of HLM in swine rations was 1 %, and 2 % in case of FLM. 3. Digestibility and digestible nutrients content of experimental rations were not affected by the levels of HLM used 4. Carcass data showed that thinner backfat and larger loin eye muscle area were obtained by supplement of 1 % HLM. 5. Chromium retention in kidney was the highest among the tissues, and was higher as the level of HLM in swine ration increased. Accumulation of chromium in bone was the lowest. But it seemed that chromium content of tissues and organs except kidney had little connection with feeding levels of HLM. The results from this experiment indicate that HLM can be used as a protein source in properly balanced swine ration at level of 1 %, and 2% in case of FLM.