The purpose of this study is to develop a prenatal program of expressive arts to help pregnant women and to test the effect of the program on the resting of emotion, the improving of attachments towards fetuses, and the motherhood identification. The problems of this study were; firstly, what was the developmental procedure and the components of the prenatal program for the expressive arts therapy; and secondly, what was the psychological changes of pregnant women when we compared the experimental group with the controlled group by using the developed prenatal program. The developmental procedure of the prenatal program was the three stages of the review on the related literature with the basic theory on a prenatal program and the expressive arts therapy, of the feasibility study on the activities, and of the completion of the program. Two groups of pregnant women for this study were selected as the experimental group of 4 and the controlled group of 5 from J hospital in The Seoul Metropolitan City, The Republic of Korea. The experimental period for this study was 10 weeks from July 31 to September 30 in 2009. The number of practices for this expressive art program was 10 of each with 120 minutes long. The major conclusions in this study could be summarized as follows: Firstly, through the three stages of the developing the program the result of the feasibility study on the activities was shown to be appropriate. Secondly, it was founded that the emotional rest, attachments towards fetuses, and the motherhood identification for pregnant women in the experimental group had been improved as compared with the controlled group by practicing the developed prenatal program of expressive arts, and their statistical confidence levels were highly significant. Thirdly, in the results of qualitative analysis for the participants' subjective experience the average of individually evaluating points in the participants' performance on all of 10 sessions were generally high. Fourthly, as the analytical results by five stages of the expressive arts therapy for participants' responded data on activities all of 4 pregnant women under study were shown to be reached to the stages of both change and growth in an understanding for themselves, improving the interaction between pregnant woman and fetus, a new recognition and self confidence for motherhood roles, reducing the delivery unrest, a pledge for a harmonic relationship among family members, and the likes.