The present study was designed to test the effects of cognitive-behavioral therapy and relaxation training on premenstrual syndrome (PMS). Premenstrual Assessment Form (PAF) was used for measuring the severity of PMS. The subjects were 39 students with PMS but without the affective disorders through PAF and Syrnptom-Checklist-90-Revision (SCL-90-R). These subjects were assigned into the cognitive-behavioral therapy (CBT) group (n=8), the relaxation training (RET) group (n=9), and the wating-list control group (n=12). The results were as follows. The CBT and the RET were significantly effective to reduce PMS, and the CBT was found to be superior to the RET. Finally, the limitations and implications of this study were discussed.