The Bridge Foot Plaza is small open space whichh is located at the foot of a bridge. This paper describes the tansition of Bridge-Foot Plaza a point of laws, space characteristics and facilities in Chuo-ku (old Tokyo City area at Nihonbashi-ku and Kyoubashi-ku) in Tokyo. There were total 244 Bridge-Foot Plazas in 1954, 175 in 1974, now there are total 162 Bridge-Foot Plazas. Except for main facilities (police box and toilet), it is newly estabrished park for children, pocket park and transportation facilities. A decrease in Bride-Foot Plaza is caused by burying the canals and removing the bridges.