This study aims to examine the relationship between job attitude and leadership style perceived by employees in a hospital. This study has two purposes; 1) to investigate the relationship between leadership styles and job attitudes[Organizational Commitment and Turnover Intention], 2) to verify the moderate effect of organizational support on the relationship between leadership style and job attitude. We examined the effect of critical leadership styles on the job attitude of employees in hospital organization. Hypotheses on four factors were tested for 7 hospitals. In order to test these hypotheses, survey questionnaires were sent to employees of hospital organization in Gyungbuk. As a result, the 185 available data were collected. Correlation analysis and regression had been performed and the results supported hypotheses. The results indicated that it was significant difference between each leadership style and job attitude. Also, organizational support was found to be positively moderated on job attitude.