Lean manufacturing is a business strategy developed in Japan. In the present scenario, the global market is developing new techniques for getting more and more production rate with a good quality under low cost. In this context, human factors have to be given importance to their working conditions. This study demonstrates the impact of lean manufacturing system principles on the improvement of organizational performance and the ergonomic conditions of the employees. Here, the author wants to bring an idea about the human well beings, within the continuous improvement process of the industry. The aim of ergonomics is to adapt the new techniques to their work in efficient and safe ways in order to optimize the well being and increasing the production rate. By conducting survey on various disciplines and showed how the production rate and human well being is affected.