Ponder a number of puzzling paradoxes of interpersonal sensitivity. In various situations, it appears that a tremendous amount of important interpersonal knowledge is rapidly communicated, most of the time nonverbally such as facial expressions, body movements, tone, dress, time, space and so on. Yet we usually do not understand how this occurs. On the other hand, there is a great deal of misinformation and misunderstanding in face to face human relation. We often can not decipher precisely what is going wrong. Such matters undoubtedly involve the sounds, gestures, touches, and faces of spreading of emotion. Since all nonverbal signals are not universal we have to understand it culturally and contextually for mutual understanding. Lack of knowledge of nonverbal communication creates barriers in cross-cultural communication. This thesis introduces the necessity of nonverbal communication, function of nonverbal communication, categorization of nonverbal communication and how different culture affects nonverbal communication. It provides cross-cultural cooperators with a good start in the understanding of others cultures and enables cross-cultural communication more successful.