Today, security is recognized as an absolute need in application development. The healthcare sector deals with very sensitive data, patient’s medical records need to be kept confidential; hence, security is very important. Role Based Access Control (RBAC) is increasingly used for ensuring security and privacy in complex organizations such as healthcare institutions. This papers is implemented the database security system by using RBAC for the patient treatment information. In this system, the employees of the hospital such as Head of Hospital, Doctors, Sisters, Nurses, Lab staffs and others are defined their role and access right for each role in order to access the treatment information. To improve better security within the system, this system can also control to the sensitive data by controlling attributes using RBAC. The main concept underlying this system uses the RBAC to control unauthorized access to patient medical information