This study is undertaken with a view to find out the academic achievement of secondary school students having differential level of Academic Anxiety. It was hypothesized that there exists a significant difference in academic achievement of secondary school learners having differential level i.e. high, moderate and low level of Academic Anxiety. For verification of the hypotheses, the data were collected by administering ‘Academic Anxiety Scale For Children (AASC) on 200 secondary school students of Mandi district of Himachal Pradesh by adopting lottery method of random sampling. The statistical technique used was one way ANOVA. The findings of the present study revealed that the Academic Anxiety and academic achievement both are highly correlated to each other. High Academic Anxiety results in low academic achievement and vice-versa. It was also found that the academic achievement of girls were better than boys. In the end, results have been discussed and implications have been made.