Within the scope of the study aiming to determine the effectiveness of communication between mentors and mentees during the mentor-supported project writing training process, an eight-week mentored project writing activity titled "Theoretical and Applied Project Writing Training IV" was organized under the coordination of Atatürk University Project Development and Coordination Office. Within the scope of the event, 20 mentors with project experience were assigned to 20 researchers who had no previous external funded project experience. After the end of the training program, interviews were conducted with 5 mentors and 5 mentees involved in the project, and their views on the effectiveness of communication in the mentoring process, in particular on the communication skills of the parties and the communication problems in the process, were received. Within the scope of the research, in which the single caseholistic design, which is one of the qualitative research methods, was used and the data obtained were analyzed with the descriptive analysis method, it was determined that the participants saw communication as a very important element in the mentoring process. As a result of the study, it was also determined that the participants thought that having the basic communication skills of the parties made the mentoring process more effective, they found the communication skills of their partners in the process sufficient and they did not experience any significant communication problems.