The subject of this final thesis is key communication skills in sales. The aim of the paper is to state which key communication skills in sales should be possessed by successful salespersons. The research question to be answered in this final paper is what key communication skills salespeople need to possess to be successful in sales. People communicate every day, on a verbal and nonverbal level. Of all the skills that people acquire throughout life, communication skills are among the most important skills that they apply in both business and private life. Depending on how welldeveloped communication skills individuals have, they are (un)successful in the communication process. When it comes to sales, communication skills greatly influence the outcome of a sales conversation. For this reason, salespersons should have developed communication skills and should actively work on improving them. Salespersons, during the sales conversation, use their verbal and non-verbal communication to influence customers and their purchase decisions. The difference between successful and unsuccessful salespersons is the communication skills they possess. The role of the salesperson is to approach the customer, meet the customer, connect with the customer and encourage the customer to buy the product, and this cannot be achieved if the salesperson does not have developed communication skills and does not know how to properly apply communication skills in sales conversation. In order to better understand the importance of communication skills in sales, the paper will show through two interviews with salespeople how the application of communication skills affects the success of the sales conversation.