Background and aims:  A healthy and balanced diet is quit important in life time and during pregnancy in particular for health of the mother and her unborn baby. The aim of this study was to Measure health belief model construct about nutritional practices of pregnant women in Saveh University of Medical Sciences.

Materials and Method: This is a cross-sectional and analytical study that carried out on 260 pregnant women in health centers dependent of Saveh University of medical sciences. Data collecting based on the Health Belief Model (susceptibility, severity, perceived benefits and barriers, self efficacy and cues to action) and the checklist of practice pregnant women about diet. The data collected from organized interviews and finally using descriptive and analytical statistics were analyzed.

Results: The mean age of participant was 27.4± 5 and mean gestational age was 5.5±2.4. In this study significant correlation observed between perceived barriers, sensitivity, severity, benefits, barriers and perceived self efficacy with nutritional practices of pregnant women (p<0/05). In addition, a significant relationship was found between the levels of their education, employment status and number of pregnancies with nutritional practices (p<0/05).

Conclusion:  As regards the mean score of Health Belief Model construct in pregnant women is moderate. Therefore, to improve the health of mothers and their children a educational program based on health belief model for enhancing sensitivity and  perceived severity of health worker to their health and increase their self efficacy and benefits perceived with the reduce perceived barriers is recommended.