Based on the research undertaken so far, it has been determined that interpersonal relationships are related to a strong connection between individuals who work within the same organization. Employees working in the same organization (company) should share a special bond to keep the organization at a high level. It is necessary for individuals to be honest with each other, to respect each other when it comes to the process of communication, all for the sake of healthy and positive interpersonal relationships which contribute to creating a positive work environment. Communication is present in all aspects of human life and it is difficult to imagine life without it. Its span cannot be reduced merely to the ability to use speech – far from it – it encompasses, for example, the ability to present and substantiate one’s opinion, the ability to take part in a dialogue, as well as the willingness to communicate. Communication is often defined as the process of direct or indirect exchange of meaning, or mutual transmission and reception of messages by means of different signs and their combinations. There are different approaches when it comes to classifying communication, most often sorted according to the form and mode of communication. The form of communication can be verbal and non-verbal, while the mode of communication refers to interpersonal, group and public communication. One chapter of this paper will focus in more detail on interpersonal communication, which is the basis of the work process. Communication is developmental and subject to constant change; it is both verbal and non-verbal. This paper describes the importance of communication within an organization, both formal and informal, and the ways in which organizational communication affects interpersonal relationships between employees of equal rank and between managers and their employees. Conflicts in organizations are a normal occurrence, and they may arise due to business communication in the form of a disagreement between two or more employees. It is important to take notice of conflicts as soon as possible for the benefit of the organization and its employees in order to resolve “disputes” that could have negative outcomes. The research analysis of the relationship between organizational communication and interpersonal relationships is based on 144 questionnaires filled out by employees of a company that deals with energy production. The answers obtained help understand the importance of the method of communication within the organization and show which method of communication leads to better interpersonal relationships at all levels and at the same time improves work efficiency, especially when there is a conflict.