This study was conducted to compare the rice straw. native grass hay and corn silage as a main roughage on the feed intake, milk production and changes of body weight of milking cows using 3×3 Latin square design. The results obtained are as follows; 1. Dry matter intake was less in rice straw feeding than that of native grass hay and corn silage feeding. This difference was attributed to amount intaken of roug page. But the difference in dry matter intake was not significant. 2. Milk yield of rice straw feeding tended to less yield than that of native grass hay and corn silage feeding, but the difference w-at not significant. While 4% FCM yield of rice straw feeding was highly significantly less than that of native grass hay and corn silage feeding. Butter fat content of corn silage feeding tended to lower than that of rice straw and native grass hay feeding. But the difference was not significant. 3. Body weight was increased in treatment of native grass hay feeding by 20㎏ in total of 3 cows, while any change was not observed in the other treatments. But the difference was not significant.