This study investigated the hypothesis that an over-adaptation tendency predicts burnout. The Over-Adaptation Tendency Scale for Adults (OATSAS) and the Maslach Burnout Inventory (MBI) were administered to 116 elementary school teachers. Multiple regression analysis showed the following. There was a positive relationship of the total score of the OATSAS, appraisal from others, and focusing on problem children to emotional exhaustion. There was also a positive relationship of the total score of the OATSAS to depersonalization. Regarding personal accomplishment, the results showed a positive influence of need for positive feedback and obsessive-compulsive personality, and a negative influence of appraisal from others.