This study attempted to measure self-disclosure changes of nurses a result of human relations training. The study population consisted of 49 nurses in Seoul. The instrument used in this study was the Self-disclosure questionnaire developed by Jourard in 1958, was designed to measure verbalized aspects of self-disclosure defined as a voluntary act of revealing personal data about oneself including beliefs, values, feelings and perceptions to another person. The SDG instrument is devided into six areas: attitude, taste and interest, personality, money, work and body. The main findings were summarized as follows: 1. After training, the subjects disclosed more than before. 2. Subjects tended to very the amount of self-disclosure with respect to the category of information to which an item about the self belonged. Two clusters of aspects emerged, a high disclosure cluster including Attitude, Tastes and Interests, Personality and Work, and a low disclosure cluster comprised of Money and Body. 3. Before and after training, there was significant difference in the self-disclosure to the peer nurses. Subjects showed the highest self-disclosure to friend, with lesser amounts to patient. 4. Charge and head nurses showed the highest differences in self-disclosure resulting from human relations training.