Robots are playing key role in today’s world. Robots are actively taking part in the industries, hospitals, defense applications as well. This paper describes about how hand gesture movements can control the robotic arm. Hand gesture data is recorded by the leap motion controller. That captured gestures are then processed and sent to the microcontroller. In this paper we are intended to design a robotic arm that is completely useful to the people with disabilities. We are using new kind of sensor called Leap motion controller, which captures the hand gestures in 3D. we develop a robotic arm that is useful for the paralyzed people, industrial applications, medical fields by just simply using the hands, we can guide the leap motion controller so that the robotic arm can perform its operations.