The main objective of this study is to find out the relationship between mental health and adjustment of higher secondary school students. Mental Health Scale developed by Sakthimani (2010) and Adjustment Inventory developed by A.K.P. Sinha and R.P. Singh (2007) were used to collect the relevant data. The sample consists of 103 higher secondary school students of whom 53 are male and 50 are female. The data are analysed by "t" test and Karl Pearson's Product moment correlation. The result indicates that there was significant relationship between mental health and adjustment of higher secondary school students