It is estimates that about 13 millions people, that is to say about 10 percent of people, are live in condominiums in Japan now. Especially in urban area, because of concentration of people, many large scale condominiums have been built, and are being built. Some condominiums are large housing complex type where more than 1,000 families live, and others are tower type which are over 30 stories buildings. These condominiums are too large. We need to clarify how large scale condominiums influence residents’ lives. The purpose of this article is to clarify relationship between residents’ relations and condominium’s attributions such as scale, location and so on, in urban large scale condominiums around Tokyo. We conducted interviews and questionnaire to residents of condominium for this purpose. The subjects of the interviews are 7 people who live in condominium around Tokyo. We clarified that opportunities to get to know others in condominiums were categorized into following 4 groups through interviews. (1) Spatial proximity; living next door and in same floor, meeting with at EV. (2) Commitment to activities about home owners association. (3) Participation in events and circles which are carried out in condominium. (4) Existence of mediator, especially children. The subjects of the questionnaire are 21 urban large scale condominiums, and we analyzed 2,052 questionnaires. 21 condominiums were categorized into 4 groups by cluster analyses from a viewpoint of the number of close friends and acquaintances. We found that attributions of building were different in each groups. We call each group as follows. (a) Suburban housing complex type; residents tend to have many close friends and many acquaintances. (b) Urban housing complex type; residents tend to only have many close friends. (c) Suburban tower type; residents tend to only have many acquaintances. (d) Urban tower type; residents tend to have neither many close friends nor many acquaintances. After this cluster analyses, we considered the difference of opportunities to get to know others in condominiums by each group. We found that opportunities to get to know others have following characters. (1) Spatial proximity and (2) Commitment to activities about home owners association; These opportunities are more effective in (a) Suburban housing complex type and (c) Suburban tower type than in (b) Urban housing complex type and (d) Urban tower type. (3) Participation in events and circles; this opportunity is more effective in (a) Suburban housing complex type and (b) Urban housing complex type than in (c)Suburban tower type and (d)Urban tower type. (4) Existence of mediator, especially children; this opportunity is most effective in (a) Suburban housing complex type. Like these, we can found that residents’ relations differ from condominium’s attributions. We can consider that (1) Spatial proximity and (2) Commitment to activities about home owners association influence to get to know others, and that (3)Participation in events and circles influences to make close friends, in urban large scale condominiums.