Introduction: Ramadan is a holy month for Muslims during which avoid from eating, drinking and sexual intercourse for about 13-17 hours. The aim of this study was surveying the effects of Islamic fasting in Ramadan on lipid profile and blood pressure.Materials and Methods: we designed this study in two phases, a week before and a week after Ramadan month. Eighty nine healthy subjects with 20-50 years old were participated in this study. Blood sampling for lipid profile measurement was done in the morning and blood pressure was measured in the afternoon with digital sphygmomanometer. Statistical analysis was performed with SPSS version 16.0 software.Results: In a week after Ramadan, body weight and body mass index (BMI) decreased in both sexes, comparing with the week before Ramadan measurements (