Purpose: The aim of this study was to explore the concept and structure of athletes’ Julsil and to develop the scale of Julsil. Methods: To establish the concept of athletes’ Julsil, we conducted in-depth interview with 19 national-level athletes in 10 sports. Preliminary questions for Athletes’ Julsil Scale were developed based on literature review and the inductive contents analysis on the interview transcripts. To evaluate reliability and validity of the scale, exploratory factor analysis and confirmatory factor analysis were conducted with the survey of 464 athletes. Results: Using the inductive contents analysis on the in-depth interview, three sub-factors were classified such as expectation of success, self-control, and perseverance and overcoming. Also, results from factor analyses and correlation analysis defined total fifteen items for the Athletes’ Julsil Scale (five items for each factor), and identified internal reliability and convergent validity.