This paper aimed at clarifying the current circumstances of infants’ out of school activities of nursery schools in urban parks, and analyzing the relationships between urban park usage and users’ attributes, such as infants’ age. The result of spatial analysis using GIS revealed the differences of the range of urban park usage between nursery schools and kindergartens. And through the investigation of the comparison among the presence of urban park facilities and urban park usage, it was clarified that infants under the age of two did not need lavatories in urban parks because many of them were in a diaper, while the infants over the age of three required lavatories during their use of urban parks as nursery schools’ out of school activities. Moreover, though seals were recently put on the certain play equipments in urban parks which showed their target age of children, it was clarified that such announcement excessively regulated infants’ uses of play equipments.