This paper deals with the main aspects of the negotiation as one of the key business processes and communication as a vital part of that process. Conditions of modern business may be characterized by intensifying competition and continuous changes, and as such imposes the need for giving importance to certain skills and knowledge. In this case, it is important to master communication skills to improve negotiation ones which will contribute to increasing the likelihood of a successful outcome of negotiations. In addition to the importance of the art of speech, or the mastery of verbal communication, it is good to know what do reveal signs of nonverbal communication and how individual emotions physically manifest. In addition, it is important to know own interests and the interests of the counterparties in order to better establishment of the communication and to take care of the negotiating climate and selection of appropriate communication medium. The most effective way of negotiating is face to face one, but sometimes circumstances dictate the use of other communication medias too. One should know what are the advantages and disadvantages of each of them, and for what exactly negotiators remain disadvantaged of communicating through them. All of this is exposed in this thesis with the aim of pointing out the importance of communication skills in business negotiations.