Beliefs, especially in the second half of the 20th century, have been the subject of research in many fields. One of these areas is education. When the literature on beliefs and education was examined, it was seen that the beliefs of academicians, teachers, pre-service teachers, and students were discussed in the context of different dimensions and characteristics. Some researchers emphasized that people's beliefs play a role in their behavior, others also stated that individuals' beliefs affect their attitudes, behaviors, and decisions. In this sense, approaches regarding the impact of beliefs on an individual's professional life have gained importance, and many studies have been conducted in this field. Music teaching is among the professions frequently discussed in these studies and research about beliefs. In addition, it seems that the beliefs of pre-service teachers who have not yet stepped into the profession are among the issues that researchers are significantly interested in. This study includes all stages of the adaptation process of a measurement tool developed for research in the field of music education into Turkish. The scale subject to the study was developed by Biasutti (2010) to determine individuals' belief levels regarding the phenomenon of musical ability. As a result of the adaptation of the measurement tool Music Abilities Beliefs Questionnaire (MABQ), consisting of 4 factors and 51 items, 4 factors were reduced to 46 items and its name was translated into Turkish as “Müzikal Yetenek İnanç Ölçeği”.