The present study examines the influence of gender, intelligence and stress on academic achievement of primary school students of Narayanavanam and Nindra mandals of Chittoor District of Andhra Pradesh. The sample of the study consisted of 400 students (200 males and 200 females) from 8^th class students. Intelligence was measured by Raven’s Progressive Matrices (RPM) by Raven, J.C (1972) and stress was assessed by using Students Academic Stress Scale by Rajendran and Kaliappan (1990). The end results of 8^th class were used for collecting data for academic achievement. The obtained data are quantitatively analyzed by using Means, SDs and Analysis of Variance (ANOVA). The findings of the study reveal that there is a significant influence of gender, intelligence and stress on academic achievement of primary school students.