This study was carried out to collect basic data on municipal infant health checkups in Yamanashi Prefecture and to clarify the actual states of the checkups in order to determine child-rearing problems. In 2001, questionnaires were sent to public health nurses in all of the 64 municipalities of Yamanashi Prefecture and 42 responses (which include 6 cities, 22 towns and 14 villages) were analyzed. All responding municipalities performed special infant health checkups in addition to the regular checkups. Municipal public health nurses conducted infant health checkups together with nurses, midwives, dietitians and volunteers. They spent time listening to mothers during health counselling about child-rearing problems. After the infant health checkups, municipal public health nurses contacted health centers, hospitals and child consultation centers for the effective handling of child-rearing problems. Municipal public health nurses in Yamanashi Prefecture seemed to use every infant health checkup to know family environment, child care behavior and state of childs health.