The present study was conducted with the purpose to see a study of Effectiveness of life skills on increasing self-esteem of high school students. The present study was conducted to a randomly selected sample of 200 high school student of 6-8th class studying in Government and Private schools of Sonipat deistical in Haryana. Life Skills developed and standardised by M.N.Vranda (2009) & Self-Esteem developed by Dr .K. G. Agarwal (2015) tool was used for the collection of data in n the present study. The data were analyzed by employing mean, SD,‘t’- test & ‘r’ value. The results of the study showed that female students of high schools are found life skills less adjusted than male students of high schools. Govt. school students are found life skills less adjusted than private school students. No significant difference is found in the self-esteem of high school students in relation to their gender and type of school.