This experiment was conducted to compare feeding value of various calcium-phosphorus supplements on the performance of laying hens. A total of 20 0 Leghorn hens were employed for a period of 24 weeks, and divided into 5 diet groups consisted of control group (no Ca · P supplement), tricalcium phosphate 1 (TCP₁), tricalcium phosphate 2 (TCP₂), dicalcium phosphate (DCP) and bone ash group. The results obtained are summarized as follows: 1. It was found that various sources of calcium and phosphorus supplements had no effect on feed intake, feed efficiency, egg production rate, egg sige, number of shelless eggs, egg shell thickness and chemical composition of egg shell. 2. In general, no differences were found in nutrient utilizabilities, except crude fat. 3. The hens fed bone ash supplemented diets showed slightly more ash deposition in tibia than other treatments, although no statistical difference was found among treatments. 4. The changes in body weight and mortality of hens were not affected by various sources of calcium and phosphorus. Results obtained from the present experiment indicate that various calcium. phosphorus supplements did not affect egg product ion rate, egg shell formation, bone ash and over-all performance of laying hens.