The purpose of this study is to investigate the effect of parent-child art therapy using CPRT(Child-parent relationship therapy) on child problem behaviors. The subject for this study was a pair of mother and her child who visited ‘G’ counseling center located in ‘A’ city, South Korea. They visited the counseling center to improve the child’s problem behaviors. It was one of the child’s problem behaviors that he phoned his mother during her work more than five to six times a day to complain headache and stomachache. The CPRT-based parent-child art therapy used in this study consists of four steps including parent education, parent-child art therapy in the home, supervision using recorded videotapes, and feedback. The changes in parent rearing attitudes were analyzed by the questionnaire on the parental rearing attitude and parent’s self report. And the changes in child problem behaviors were analyzed by ‘AB’ single system design, recording frequency of target behaviors, which is composed of baseline, intervention and maintenance. This study showed that CPRT-based parent-child art therapy had positive effect on parental rearing attitudes(acceptance/rejection, autonomy/control, and parental achievement pressure). And also it improved child’s problem behaviors (addictive phone use, complaints of physical symptoms). Therefore CPRTbased parent-child art therapy may be effective for improving parental rearing attitudes and child behaviors. This study has significant implication that parent-child art therapy combined by CPRT may be applied in the field of art therapy for improving child's problem behaviors.