The purpose of this paper is to analyze the character of the residents who are hard to take part in the management of condominiums. The results are as follows; (1) In the residents of condominiums, some residents exist who are hard to take part in the management of condominiums.They exist mainly in such condominiums as a unit size is smaller than 30m^2, location is the midtown area and easy of access. (2) With regard to the residents' characters, absence owners and single owners apart from their family abound in one-room-type condominiums, and dual income families and the aged owners abound in family-type condominiums. (3) Owing to existence of such residents, many troubles are caused, for example, the attendance of a generel meeting is low, and the select of owners-association stuffs is difficult, therefor in fact the owners-association is inactive. (4) It is necessary to produce the new type management system for condominium-residents who are out of keeping with the existent management system.