Knowledge of behavioral styles and communication styles in a business environment are of great importance to the individual. They help him to manage quickly and behave well in any business situation. The rules of business conduct are based on the rules of business etiquette. Business etiquette is a set of norms or respected rules of conduct in the business environment. It is important to apply them in every business situation, whether more casual or serious. A business environment is not only an office space, a meeting room and the like, but also a specific place outside the company, such as a restaurant, where business partners meet. A communication process means the transmission of a message from the sender to the recipient through a specific channel. In a business environment, a clear, accurate and timely message is extremely important. Therefore, it is necessary to have a good knowledge of business communication and communication styles. The most common forms of communication are verbal and nonverbal communication, while the most common forms of business communication are formal and informal communication. Communication styles are as follows: passive style, aggressive style, passive-aggressive style, assertive style, and manipulative style. Applying behavioral and communication styles in a business environment is a guarantee of long-term success of business relationships.