AbstractGroups are a part of human life. Every day humans will be involved in group activities. Groups are also part of the life of the organization. In these organizations, many groups will be found. In general, people who are members of a large or small organization are very strong in their tendency to look for intimacy in certain groups. The existence of a group of organizations begins with the similarity of work done, the closeness of the workplace, the frequent encounters, and perhaps the similarity of mutual enjoyment, there arises a closeness with each other. Begin they group in certain organizations.Human behavior (within organizations) can be assessed based on three levels, namely individuals, groups and organizations, each of which has a unique perspective. Understanding group dynamics is very important to understanding organizational behavior. Because, groups are a central part of human daily life, and at certain times each person will be part (members) of different groups.