This study was to identify the structure of sports drop-out of athletes considering cognition, emotion and situational motivation, and to develop the measurement of sport drop-out motivation. For this, the validity of internal structure and relationship with overall drop-out intention were examined by targeting 689 individuals and team athletes. The results were as follows: Sports drop-out motivation was verified two hierarchical structure. One is individual internal factor including loss of interest, overtraining, loss of confidence, the other is environmental external factor including home environment, career anxiety, academic slump. The female players have higher drop-out motivation level than male players, and the drop-out motivation was shown the difference by level of school. Also, loss of interest and confidence weres to predict overall drop-out intention well. Therefore, this study was found this measurement was able to reliably predict drop-out motivation among players.
