The job is one of the essential elements of human happiness. On the other hand, workers are exposed to many hazardous environments that cause disease. The Occupational Safety and Health Act aims to “maintain and promote the safety and health of those who provide labor,” by “establishing standards regarding occupational safety and health,” and “clearly addressing the responsibility.” The law is based on the duties of the employer and government and the rights and duties of workers. The law generally describes the minimum standard, and the user should extend the concept of protection in law. This article describes the Occupational Safety and Health Act related to mental health protection. The data is expected to help medical doctors better understand and apply the law as a concept of protection.