This experiment was conducted to compare the utilizability of calcium and phosphorus in two locally produced tricalcium phosphates (TCP), dicalcium phosphate (DCP) and bone meal with 300 broiler-type chicks of one day old. Chicks were divided into 5 treatments consisted of TCP₁, TCP₂, DCP, Bone meal and Control group for a period of 8 weeks. The results obtained are summarized as follows. 1. The calcium phosphorus contents of TCP₁, TCP₂, DCP and bone meal were analyzed to be 29.98% and 15.72%, 26.64% and 13.51%, 26.62% and 13.51, 23.36% and 5.97%, respectively. Fluorine content of TCP₁, TCP₂, DCP and bone meal was 0.14, 0.09, 0.33 and 0.02%, respectively. 2. Body weight gain, feed intake and feed efficiency were not significantly affected by the source of calcium and phosphorus supplements. However, it was found that chicks received TCP₁ gained more body weight than the birds fed DCP or control diet. 3. No difference was found in nutrients utilizability when different source of phosphates was fed. 4. The ash, calcium and phosphorus contents of tibia in chicks were not influenced by the source of calcium and phosphorus supplements. The results obtained from the present experiment indicate that the utilizability of calcium and phosphorus in TCP was better than that in DCP. It was clear that the nutritive value of TCP would be similar to bone meal or even better than bone meal.