In this research work, we developed an application based on Augmented Reality (RA) to teach parents or guardians of deaf children. The problem is that parents have serious difficulties in communicating with their children, because they do not use the same language for communication. An application based on Peruvian Sign Language was developed, using the Unity video game engine, the Leap Motion component, javascript and the C # programming language. This application allows parents or guardians of deaf children to be taught the sign language that allows them to communicate adequately with their children. The tests were conducted with 10 parents in the district of Andahuaylas in Apurímac-Peru. The results show that the parents or guardians are motivated to use the proposed application, and the learning time of the first 9 letters of the alphabet have reduced from 4.1 to 2.1 hours.