Five diets with equal levels of protein were formulated to investigate the performance of grower-finisher swine on diets which included high levels of rice bran, a tropical feed by-product. Four levels of rice bran (10, 20, 30 and 40%) and a control were used. ADFI was unaffected by the rising level of rice bran. Effects on feed efficiency were only found to be at the 40% inclusion of rice bran, where it was elevated (P < 0.05), mainly due to the significantly lower ADG of pigs on this diet (P < 0.05). Carcass quality, as measured by dressing percentage, water loss and backfat thickness, was equivalent in swine on the different treatments. The weight of the stomach increased as the proportion of the rice bran in the diet rose, but the weights of the small and large intestines decreased (P < 0.05). The lengths of the intestines did not differ significantly between swine on different diets. The results indicate that rice bran is a feasible alternative to conventional feeds.