An experiment in volving 63 crossbred gilts was conducted to determine the interactive effects of energy (3.0, 3.2 and 3.4 Mcal digeszible energy/㎏) and crude fiber (5.7 and 9%) on the performance, carcass characteristics and gastro-intestinal weight of growing-finishing swine. As digestible energy increased, there were significant differences (p$lt;0.01) in daily gains. There were no significant differences in gains due to level of crude fiber. Daily feed intake and feed per ㎏ gain was reduced with increasing energy levels. However, there were not apparent differences by increasing fiber level. In carcass traits including dressing percentage, backfat and organ weight were found significant interactions (p$lt;0.01) between energy and fiber level. The results suggest that fiber level up to the nine percentage at constant energy level had no effect on rate of gain, feed per ㎏ gain, carcass traits and gastrointestinal tract weight.