In order to study the interrelationships of dietary such factors as wheat bran, calcium and salt a total number of 480 broiler chicks of Hisex-Hibro strain was fed 3 × 2 × 2 factorially arranged experimental diets for 28 days. In the present experiment were used 3 levels of dietary wheat bran (0, 5, 10%), 2 levels of dietary calcium (0.9, 1.5%) and two supplemental salt levels (0.3, 1.0%). Body weight gain, daily feed intake, feed efficiency and gall bladder weight were measured. And bone calcium content, bone ash content, serum calcium content and serum sodium content were also measured. The results observed in the present study are summarized as following: 1. Body weight gain was gradually and insignificantly decreased as dietary level of wheat bran was increased, and dietary levels of calcium and salt failed to show any significant effects on the body weight gain. But high Ca × high salt gained slightly more body weight than low Ca × low salt. 2. Feed intake was significantly decreased (p$lt;0.01) as the level of wheat bran was increased. Interaction of wheat bran with dietary levels of salt or calcium were found significant (p$lt;0.01); increased level of wheat bran resulted in decreased feed intake when salt level was lowered or when calcium level was increased. 3. Feed efficiency was not affected by any combination of dietary level of the experimental materials, although high Ca × high salt groups showed slihtly improved values. 4. Weight of gall bladder was increased as dietary level of wheat bran was increased or as dietary level of calcium. was decreased (p$lt;0.05), and high salt × high Ca showed heavier gall bladder weight than low salt × low Ca. 5. Bone calcium content was not significantly affected by treatments, except decrease (p$lt;0.05) with high level of wheat bran. Bone ash retention was increased with high dietary salt level and it was more pronounced with high calcium level. 6. Serum calcium content was increased as the dietary levels of wheat bran and calcium were increased (p$lt;0.01). Serum calcium with low calcium × high salt was decreased, but with high calcium × high salt decreased. Serum sodium level was increased with increased dietary levels of calcium or salt (P$lt;0.01), and it was affected by dietary wheat bran level (p$lt;0.01) and seems to be due to interaction between dietary levels of wheat bran and salt.