The aim of this study was to analyze the attitudes of professionals in Mental Health Services throughout Spain who are directly or indirectly involved in the use of mechanical restraint and the barriers perceived to reduce its use. The study involved an online anonymous survey using Google Forms completed by Spanish mental health professionals working with service users; the survey assessed their involvement in and general attitudes and beliefs towards mechanical restraint. The survey was completed by 225 participants. Only 13.30% of the participants considered that mechanical restraint use was never necessary to guarantee the safety of users/staff in dangerous situations. Poor staff training (38.0%) and a lack of resources/staff (34.7%) were the most frequent barriers identified for the reduction of mechanical restraint. In the multivariate analysis, participation in learning programs to prevent the use of mechanical restraint was associated with lower acceptance of the use of mechanical restraint, but the result was barely significant (p= 0.050). A high percentage of mental health staff still consider mechanical restraint use necessary for safety reasons. According to the results, the participants perceived that more staff and resources and better training could reduce the use of mechanical restraint in Mental Health Hospitalization Services.