The present study was conducted employing descriptive method. The independent variables were intelligence and socio-economic status and dependent variable pertained to underachievement in science. Regression equation was used to identify underachievement in science. To study the main effects and interaction effects of independent variables of intelligence and socio-economic status on the dependent variable of under achievement in science, statistical technique of analysis of variance was employed.Our results suggests that intelligence is positively and significantly related to underachievement in science. Teachers and parents should consider the fact that children who are underachievers may be due to low intelligence. So child should not snub or punished without his own fault. Teachers should give more attention to these students. Home work, assignments or other study material should be provided to these students according to their abilities. Further results show that socio economic status is positively and significantly related to underachievement in science. To raise this status of child, financial help should be given the children of poor economic background.