The primary goal of this paper is to explain the concept of non-verbal communication and show its function within the business environment. Non-verbal communication in combination with other types of communication helps reveal the interlocutor's thoughts, feelings and intentions. We divide non-verbal signs into extralinguistic and paralinguistic. They are thoroughly and individually described throughout the work, as well as their importance in different business situations. Quality communication improves interpersonal relations, which ultimately contributes to the achievement of business goals. Therefore, by practicing non-verbal communication, it is possible to become a better communicator and achieve success at work. It is very important to know how to interpret non-verbal signs to not to receive and transmit the wrong message. Misinterpretation of non-verbal cues most often occurs in the communication of speakers of different cultures, which can lead to failure at work and even conflict. Being a good communicator is one of the greatest virtues an employee can have and is unavoidable for achieving business success.