Infrared therapy is a method to help overcome the problem of pain and stiffness in the muscles. Before the discovery of the method, ancient massage techniques is widely used in the area of pain and fatigue. Infrared therapy is the act of remediation/ improvement of health problems, after diagnosis. The infrared therapy device is designed to complete the existing device nowadays. This device consists of infrared lamp, timer for setting the therapy duration, LCD, buzzer and Emergency Stop.Besides being able to switch off the lights automatically, this device is also equipped with the timing of the therapy process, 300 seconds (5 minutes), 600 seconds (10 minutes) and 900 seconds (15 minutes), that aims to reduce the is employed to display the timer duration of them. Based on measurement process, 0,33% of errors is obtained from 300 seconds, 0,16% of errors is obtained from 600 seconds errors, and 0,2 % of errors is obtained from 900 seconds. Based on the obtained value of error, it showed that timer device is suitable for use.