The aim of this study is to describe in what level and how medical students use metacognition. In the study, quantitative and qualitative methods were used together, by benefiting from descriptive method. The first three year (preclinic year) students of Hacettepe University, Faculty of Medicine participated to the study. In order to determine the metacognition level, Metacognition Scale was used and also 9 students were interviewed. In the metacognition scores, the differences were determined according to the phases and academic achievement levels but not gender and the curricular language. In the interviews, it's been observed that the students in the learning process go through similar cognitive stages. These stages are recalling knowledge, learning new information and ensuring the sustainability of learning.