The study aims to analyze the relationship between decision making styles and self-efficacy of secondary school students. For this purpose, 500 subjects (male and female) were selected randomly from senior secondary schools situated in four districts of Haryana. Decision-Making Styles Scale developed and standardized by the investigator herself and Self-Efficacy scale developed by Murris (2002) were used. Finding of the study indicates that with increase of self-efficacy, there will be increase in decision-making styles of students. Study suggested that in today’s complex world there is a great demand to develop effective skills in students through education which will help them in making right decisions at right time in different walks of life.