This study aims to clarify the change of enterchange structure by commutation in local urban region in order to gain some useful information to the merger of municipalities at present. Therefore, we selected Fukui Urban Region as the subject of this study. The main conclusions are as follows. 1) In Fukui Urban Region, the commutation pattern of 25 peripheral municipalities in 1965, 1975, 1985 and 2000, can be divided into 5 series and 12 types. 2) From 1965 to 2000, the commutation relationship among municipalities has become strong gradually. In 2000 six small-interchange-regions can been seen. 3) The merger of municipalities within smalHnterchange-region is common in Fukui Urban Region.
