The aim of the present study was to assess the role of Big Five personality factors as predictor of   life satisfaction among students engaged in research. Using purposive sampling data were collected from 95 students engaged in research in University of Jammu. Pearson product moment of correlation and Multiple linear regression analysis was applied for statistical analyses of the data. Overall the model of Big five personality emerged out to be significant predictor of life satisfaction in research student. However, out of   Five factors of personality only agreeableness and neuroticism came out to be the significant predictors of life satisfaction. Agreeableness showed positive relationship whereas neuroticism shares negative relationship with life satisfaction in research students. The findings of the study indicate the importance of personality factors as determinant of life satisfaction in research students.