Business negotiation is a key process that contributes to the creation and realization of the company's business processes. Negotiation is part of everyday life, both in the business and private life of individuals. Individuals in business negotiation use different communication skills that serve as a tool to achieve predetermined goals. The education and development of negotiators' education play a key role in the success of business negotiations. This thesis provides a detailed insight into how important the influence of education on the seller's communication skills is in the negotiation process. By showing the influence of education on the communication skills of sellers using the example of the company JGL d.d. it delves into the core of the mutual influence of education and communication skills of salespeople. Through the analysis of theoretical frameworks and empirical research carried out internally in the company JGL d.d., the thesis elaborates in detail the key aspects of the influence of the salesperson's education on communication skills in the negotiation process. The methods used in this thesis are the following: analysis, synthesis, description, comparison, classification, generalization, specialization, proof, historical method, induction and deduction. People are the most important resource of any company, but only successful companies understand the importance of employees and work on their growth and development. Education is the key to employee success, and modern and ambitious companies recognize it and value. The company JGL d.d. recognizes the importance of investing in employee education because the pharmaceutical industry is one of the most demanding industries for doing business, it is constantly developing and requires regular investment in employees, technology and processes. For this reason, investing in the development of salespeople's education can improve their communication skills and the success of business negotiations, which is of great importance for the growth and development of companies like JGL d.d.