This study was conducted to study the effects of castration on body weight gain and carcass performance in the Korean Native Goat. Nine goat with 5 to 7 months of age were fattened for 126 days. Four goats average weighing 12.56㎏ out of 9 goats were castrated. The average initial body weight of non-castrated was 13.29㎏. The final body weight of non-castrated and castrated were 21.65㎏ and 17.16㎏, respectively. The body weight gain of non-castrated was 26.2%o higher (p≤.05) compared to castration. The daily gain in experimental period of non-castrated and castrated were 66.48 and 30.6g, respectively. The castrated one was 117.0% higher (p≤.01) a compared to non-castrated. Four goats in each treatment were measured lean percentage and the ratio of four foot to slaughter weight. lean percent of the non-castrated and castigated were 25.9% 22.1%, and the ratio of four foot to slaughter weight of those were 4.0% and 4.7%, respectively. Significant differences (p≤.05) in both variance were a appeared between two treatments. The ratio of the neck part to total carcass weight of non-castrated and castrated were 7.7% and 10.8%, respectively. This result proved to be a effect of castration on the part of carcass. Meat percent of the half-carcass of the non-castrated and castrated were 68.4% and 63.0%, and fat content of those were 11.8% and 15.7%, respectively. Results showed that the meat percent decreased (p≤.05) and the fat percent increased with castration. Reducing sex order by castration would not be distinguished with a sensory evaluation.