In this survey, the aim of study is comparing the effect of combined fluid therapy and phototherapy with the effect of phototherapy alone in treating the icteric neonates. Healthy term neonates with total bilirubin level more than 17 and less than 25 were included in our study. Neonates with any of these criteria were excluded from the study: prematurity, any systemic diseases or abnormalities, need to blood exchange, weight less than 2500 or more than 4000g and weight loss more than 3% in first ten days of life. This was a prospective clinical trial study. One hundred and sixty breast-fed neonates with hyperbilirubinemia who were admitted to neonatal ward of Besat Hospital (Hamedan, Iran (were divided randomly (alternately) into two groups of intervention and control. Eighty neonates received combination of 70cc/kg /day of ⅓⅔ serum (⅓N/S and ⅔D5W, Tehran-Darou serum Co., Tehran, Iran) and phototherapy (intervention group) and 80 neonates received phototherapy alone (control group). Mean serum bilirubin level was measured 6, 12, 24, 48, and 72 hours after the start of phototherapy and the duration of phototherapy was written in both groups.