The root system of roadside trees of urban areas does not develop to a driveway side, but develops inside a planting belt or under a sidewalk in many cases. It seems that the state where one side of root zone is restricted affects growth of trees. In this research, we considered experimentally the influence of restriction on one side of a root zone of a cherry tree (Prunus × yedoensis) often planted as a roadside tree. We installed the wall which restricts root zone in the ground of the field at faculty of Horticulture, Chiba University. We planted 6 trees 20cm, 35cm, 50cm and 100cm away from the wall, respectively. We measured about the amount of growth, the growth direction and so on of those roots, branches, and trunks. As a result, we found that dry weight of roots is significantly heavy in trees 20cm away from the wall. Branches of the side of root zone restrictions in trees 20cm away from the wall tended to grow well. Therefore, many branches will grow to driveway side when a cherry tree (Prunus × yedoensis) is planted nearby driveway. We consider that the time and effort for removing such branches as a traffic obstruction may be more consumed.