The purpose of this study is to make clear the characteristics of the relation-ships between utilization time and area of play-lot and between utilization time and condition of play-furniture, by investigating 18 play-lots. Investigation was made twice (two days) on one play-lot. The results of this study are as follows; 1. On the same play-lot, average utilization time of one day is similar to that of another day. 2. The average utilization time is different between play-lots of different areas, and between different conditions of play-furniture. 3. The longer average is about fifty minutes and the shorter average is about twenty-five minutes. The average utilization time of smaller play-lot is shorter.
