This study examined the effects of therapeutic communication skills, self esteem and self concept, psychiatric nursing lectures on students' psychiatric nursing practice evaluation scores. The purposes of this study were to determine factors influencing students' psychiatric nursing practice to improve the quality of that practice. The subjects were 123 third year nursing students in the department of nursing of G University in C city. Data were collected from 1989 to 1991 by questionaires and academic records. Pearson Correlation and t-test were used in analyzing the data to confirm the relationship and influence among the study variables. Stepwise Multiple regression was used to confirm the predictors of the nursing students' psychiatric nursing practice evaluation scores. The results were as follows: 1) Relationship of General characteristics and Psychiatric Nursing Practice Evaluation Scores: General characteriotics were not significant on psychiatirc nursing pracice evaluation scores. 2) Relationship of the therapeutic communication skill and psychiatric nursing practice evaluation scores: the higher the degree of therapeutic communication skill was the higher the scores for psychiatric nursing practice (r=.5528, p<.001). 3) Relationship of psychiatric nursing course and psychiatric nursing practice evaluation scores: the higher the scores in the psychiatric nursing course the higher the scores for psychiatric nursing prac tice(r=.2793, p<.01). 4) Relationship of self-esteem and self concept and psychiatirc nursing practice evaluation scores: Self-esteem and concept was not significant on psychiatic nursing practice evaluation scores. 5) Stepwise multiple correlation of therapeutic communication skills, self-esteem and self concept, psychiatric nursing lectures on psychiatric nursing practice evaluation scores showed that therapeutic communication skills and the psychiatric nursing course scores influenced the evaluation scores psychiatric nursing practice significantly.