This study was conducted with the aim of establishing the relationship between self-leadership and career decision-making self-efficacy in university students majoring in Taekwondo. To achieve the aim, a survey was conducted with university students majoring in Taekwondo. Of the questionnaires collected, a total of 418 questionnaires were used in the final analysis after excluding questionnaires that were judged to be unfaithful. First, as a result of examining the correlation between self-leadership and career decision-making self-efficacy of university students majoring in Taekwondo, cooperation orientation was found to be positively correlated with self-assessment, planning, setting goals and solving problems. Natural reward showed positive correlation with gathering information, planning, setting goals and solving problems. Constructive thinking showed positive correlation with gathering information and setting goals. Second, among self-leadership factors of Taekwondo major university students, cooperation orientation had positive influence on self-assessment. Natural reward and constructive thinking had positive effect on gathering information. Cooperation orientation and natural reward had positive effect on planning. Cooperation orientation, natural reward, and constructive thinking had positive effect on setting goals.