Child-rearing has been evaluated mainly from negative perspectives in Japan. Perspectives such as the anxiety, burden, and the stress of child-rearing. It should also be necessary and important to examine and support the positive dimensions of child-rearing. In this study, in order to evaluate child-rearing from a positive perspective, we paid special attention to parental development and reviewed the other possibilities of evaluating child-rearing. We then will attempt to construct the "Parental Development Scale" and investigate the scale's reliability and validity to 649 mothers whose first child is between one month and 3 and a half years old. They were located and recruited using both the mother's and the child's health record cards from a community health center. The parental development scale Originally consisted of 17 items. Two items were later excluded because the responses showed extremely partial tendencies. The remaining 15 items were analyzed using data collected from 368 mother's without missing values. Applying factor analysis, the parental development scale showed one factor, structure. Face, content, and criterion-related validities, plus the reliability coefficient were investigated. The parental development Scale presents the possibility, or at least one worth some consideration, to evaluate child-rearing from a positive perspective. There is still a need for further investigation.