The object of this study were twofold, namely, to study on (1) effect of using ultrasound therapy for curing warts (2) any relation between a cure for warts and onset of warts, as well as subject age. Our subjects, composed of 22 people from age 12 to 49, were assigned to two groups, experimental group and control group. We experimented for 8 session on 12 people in the experimental group by using ultrasound therapy to observe any morphological change in the warts or disappearance of a pain. However, we did not cure warts in the other group, control group. The result of the study are as follows. (1) Ultrasound therapy has an effect on curing warts. (2) Neither condition, onset of warts or subject age, had no influence on a cure for warts.