A descriptive study was conducted to assess the decision making power regarding postnatal diet, exclusive breast feeding and family planning methods among postnatal women in selected communities of West Bengal. The conceptual framework was based on women autonomy which is adopted from the study “Women’s’ autonomy and reproductive healthcare-seeking behaviour” conducted in Ethiopia by Yohannes Dibaba Wado. Population was postnatal women who had children of six months of age group.. 180 samples were taken from the rural communities under Kelejora B.P.H.C. A validated and reliable structured interview schedule was used to assess the decision making power of postnatal women regarding postnatal diet, exclusive breast feeding and family planning methods. The findings of the study revealed that most of postnatal women ÷(97.8%) had strong decision making power in exclusive breast feeding whereas only 31.1% postnatal women had strong decision making power in family planning methods. Majority of (76.1%) postnatal women had strong decision making power regarding postnatal diet. Statistically significant association was observed between decision making power of postnatal women regarding postnatal diet and religion (÷2 = 12.0742, at df 4) at 0.05 level of significance. In the area of exclusive breast feeding there was significant association between decision making power regarding exclusive breast feeding and religion (÷2 = 23.28, at df 2) at 0.05 level of significance. There was statistical significant association between decision making power of postnatal women regarding family planning methods and age of women(÷2 = 17.7, at df 2) and parity of women (÷2 = 6.97, at df 2) at 0.05 level of significance. The study has a great implication in Nursing service, education, research and administration. Based on the findings the recommendation is made for a study to find out knowledge and practice regarding postnatal diet, exclusive breast feeding and family planning methods. It is concluded that the magnitude of women’s decision making power on postnatal diet and exclusive breast feeding is high in this study whereas the decision making power regarding family planning methods among postnatal women is very low.