The purpose of present study was to develop the Scale of pre-parental readiness, and investigate of its validity and reliability. Participants were 103 Japanese undergraduate students, of which 39 were boys and 64 girls. Factor analysis confirmed one factor pattern associated with pre-parental readiness. Pre-parental readiness of girls was positively related to sense of authenticity, self-esteem. Pre-parental readiness of boys was positively related to self-esteem, and negatively related to self-disgust. In addition, the scale showed enough reliability, the stability of the scale was confirmed. Frequency of coming in contact with children was related to pre-parental readiness. These results suggest that intervention or education in consideration of growth of pre-parental readiness may become an effective solution method.