The current study evaluated the role of family environment and, personality hardiness in the development of happiness disposition among tribal students of Himachal Pradesh N 200, with 100 boys and 100 girls through stepwise regression analysis. Results indicated that Personality hardiness, cohesion, intellectual - cultural - orientation and achievement orientation are significant predictors of happiness in boys and explaining 39 of variance. In girls personality turned out to be the only significant predictor, explaining 45 variance in happiness.