Puruliya is one of the most backward districts in the state of West Bengal. Insufficiency of food and hence the resultant lack of nutrition for maintaining appropriate standard of living are the common features in the life of people in Puruliya. In this study we want to investigate the status of food security of the households in the rural and urban region of Puruliya due to variation in income and the choice of their food basket. A cross sectional study on 750 households of Puruliya from both rural and urban household has been made to compute the food consumption pattern at the household level using four point Likert scale. Based on the food consumption pattern, the indicator of food security at household level has been calculated on the basis of actual calorie availed by the households from the intake of food as proportion to the medically required calorie. The result of the study shows that the rural population (39.87%) suffers from food insecurity more than the urban population (13.60%). Logit regression analysis has been applied to look into the impact of food consumption pattern along with other determinants on the food security. Our analysis shows that food consumption pattern (0.013) and family income (0.004) has direct relation with food security. Holding PDS card does not reflect very much impact on food security and that may be because of not providing diverse food groups to ensure balanced diet instead of cereal based calories.