The present study was conducted to analyze study habits of higher secondary level students with respect to gender, residential zone and school type and also to investigate its relation with students' academic achievement. 803 students, who have just passed Madhyamik Examination were randomly selected from fourteen (14) Bengali medium schools under three categorical variables namely gender (boys & girls), residential zone (urban. rural & semi urban) and school type (Government, Government aided &self-financed). Study Habit Inventory (SHI) was prepared and used for the said purpose. In the present study no significant difference was observed among the students in their study habits with respect to gender (t =0 .640, p = .522), residential zone (F=1.469, p = 0.231) and school type (F =0.058, p = 0.944).It was also found that there was no significant interaction effect of gender, residential zone and school type on students' study habit (F=0.389, p>0.05). Significant positive correlation (r = 0.234, p<0.01) was found between study habits of the students and their academic achievement. Also, study habit of the students was found to be a significant predictor of their academic achievement as the overall regression procedure resulted in a R=0.234, R2=0.055, F=46.295, p<0.01. It is quite evident that good study habit is necessary for students' academic achievement as well as lifelong learning process.