This study was tried to investigate the effectiveness of assertive training on the state anxiety and assertive behavior which nursing students had experienced during clinical practice training from April 29, to June 5, 2000. Subjects for this study were thirty-six nursing students of practicing in a general hospital. Eighteen nursing students were assigned for the experimental group and trained by assertive training program during 4 weeks and eighteen nursing students were assigned for the control group. The assertive training program was composed of cognitive, behavioral and emotional assertive training. Post- test assessment was administrated to all subjects on a week later after the last session. The data were analyzed with SPSS PC programs. The results of this study were summarized as follows: 1) There were no significant differences between the experimental group and the control group on post- intervention comparisons of the state anxiety score (p=0.230), but in the experimental group, the anxiety score more decreased after the assertive training than that in the control group with significant differences(p=0.019). 2) There were no significant differences between the experimental group and the control group on post- intervention comparisons of assertive behavior (p=0.530). However, after the assertive training, the experimental group became more assertive than the control group with no significant differences(p=0.721). 3) The hypothesis that the more the assertive behavior, the less the state anxiety experienced by nursing students of clinical practice training was supported(r=-0.397, p=0.017). On the basis of this study results, the assertive training is effective for the reduction of the state anxiety experienced by nursing students of clinical practice training.