Conditions and devices for a successful encounter group at a workplace and merits of the group are discussed. Some conditions like (1) participants' attitude and expected behaviors, (2) devices for facilitating, are almost the same as ordinary encounter groups. Other conditions like (1) democratic and open atmosphere of a workplace, (2) understanding and cooperation of a workplace, are peculiar conditions for this type of encounter group. The merits are the followings; (1) change of the daily group, (2) improvement of a structure of a workplace about communication, mutual understanding, and interpersonal relationship, (3) development of common consciousness at a workplace, and (4) democratization of a workplace. The demerits are the followings; (1) limitation of topics and the development of conversations, (2) disturbing of individual interests, (3) restriction of freedom of speaking, (4) obstruction of interpersonal relationship by unsolved problems. Finally, it is suggested by the experience that this type of encounter group is one way that daily group and society are made openhearted, acceptable, and democratic, and what organizer and facilitator to make efforts are careful organization and careful facilitation that they respect all participants individually.