Adolescence is the most influencive period of human growth and development. Mental health is not merely important but essential for the survival as a social being. Mental health plays a vital role in child`s healthy development. The aim of the study was to assess mental health of Dar ul uloom and private secondary school students. The sample of 600 secondary school students (300 Dar ul uloom & 300 private secondary school students) was randomly selected from Dar ul ulooms and private schools of Kashmir Valley. Mental health battery (Singh, A.K& Gupta, A.S, 2002) was used to collect the data. The data was analyzed by mean, S.D and t-test. The results of the study revealed that Dar ul uloom and private secondary school students differ significantly on dimensions of emotional stability, overall adjustment, autonomy, self-concept, intelligence and show insignificant difference on security-insecurity dimension of mental health. Further the results show that Dar ul uloom and private secondary school do not differ significantly on academic achievement.