In this paper, I research the relationship between the free address office and the productivity of office workers, and the applicability of effective factors for the productivity of office workers in that office using questionnaire method. From the result of QAQF, the introduction of the free address office itself didn’t contribute the improvement of information exchange, creativity and morale. Therefore, the improvement of the office environment is not sufficient conditions, but necessary conditions. And, the effective personal factors and organizational factors contributed to improve the information exchange, creativity and morale in free address offices, too. So, we have to use some another measures to improve the productivity of office workers, besides the introduction of free address offices.

Recently shared office has become popular as a start-up office among young workers in the center of Tokyo, because it offers them low rent and physical interchange among them. This paper aims of the research on the planning between private and public space in shared office through the behavior observation of users around public space. The results were as follows:

1. There were various users' activity patterns between private and public space. From the observation of their collaborative activity pattern among them, distributed small public meeting space adjacent to their private space might contribute to more effective use rather than one large public meeting space.

2. In response to change of users' work style, their private space also changed among closed, semi-closed and open type so that space configuration between private and public space needed to be adjusted flexibly.

3. Gathering space of users such as common lounge and public meeting space was created at their accessible place or on the way of their private space and promoted their physical interchange.