Sport is a dynamic environment where individuals of different ages, experiences, and social roles constantly interact. In this interaction process, communication deficiencies or misunderstandings can lead to small problems escalating and conflicts emerging. Therefore, effective communication and conflict resolution skills in sport are critical for athletes, coaches, referees, and administrators to work together harmoniously. Effective communication is a fundamental tool that strengthens trust, understanding, and cooperation among individuals. In sporting settings, open, respectful, and empathetic communication facilitates the early detection and constructive handling of potential conflicts. Conflict resolution skills, in turn, prevent the destructive effects of disagreements, supporting team cohesion, motivation, and performance. These skills contribute not only to individual development but also to the healthy and sustainable nature of the sporting environment at the team and organizational levels. This book chapter aims to address the theoretical foundations, importance, and applicable aspects of effective communication and conflict resolution skills in sport.