This study aimed to assess the effects of fermenting fake cashew fruit in diets on the weight gain of goat. The study was conducted at Animal Biotechnology Center from January 2020 to December 2020. Sixty goats had 11.44 kg/head initial body weight were completely randomized arranged in 5 treatments, 4 heads (2 males +2 females )/treatment, and repeated three times with treatment 1: 100% cashew fruit + 2% probiotics; treatment 2: 65% cashew fruit + 35% rice bran + 2% probiotics; treatment 3: 75% cashew fruit + 25% rice straw + 2% probiotics; treatment 4: 75% cashew fruit + 25% dried corn plant + 2% probiotics; treatment 5: 75% cashew fruit + 25% dried cassava waste +2% probiotics. The results show that using the 65% cashew fruit + 35% rice bran + 2% probiotics; or the 75% cashew fruit + 25% rice straw + 2% probiotics; or 75% cashew fruit + 25% dried corn plant + 2% probiotics; or: 75% cashew fruit + 25% dried cassava waste +2% probiotics did not effected the feed intake of goat, which could replaced green grass in the diet for meat goats from 3 to 7 monthe of age. Using of the fementing 65% cashew fruit + 35% rice bran + 2% probiotics; the 75% cashew fruit + 25% rice straw + 2% probiotics; 75% cashew fruit + 25% dried corn plant + 2% probiotics; and 75% cashew fruit + 25% dried cassava waste +2% probiotics improved the daily weight gain of goat 79.32%; 40.9%; 39.15% and 38.45%, respectively, as compared to the 100% cashew fruit + 2% probiotics.