In the present research, a documentary exploration of motivation was carried out as a fundamental tool to reduce anxiety in students during physics classes. For this, a review of the literature was carried out where a variety of studies and investigations are found, which is derived, fundamentally, the fact that the motivation plays an essential and an essential role for the student to work the anxiety provoked by the study of physics. The motivation could change even the psychological and cognitive process of a student in all subjects. Keywords: motivation, anxiety, physics teaching.