Post natal exercise is very important to the global world and after delivery of the women exercise is great way to get back to the pre-pregnant weight. Exercise is the physical activity that is planned structured and repetitive for the purpose of conditioning any part of the body. Exercise is used to improve health, maintain stiffness and is important as a means of physical rehabilitation. After exertions of giving birth exercise actually help the body to recover. This study is descriptive in nature. The study sample consists of 30 mothers in post natal period that had normal delivery. Non-probability Sampling technique was used to select the sample. Self-structured questionnaire was used to find out the knowledge regarding postnatal exercise among post natal mothers. The study finding revealed that most the mothers 40% had adequate knowledge, 23% of participants had moderately adequate knowledge and only 7% of participants had inadequate knowledge regarding post natal exercise. And there was significant relation between the knowledge of post natal mothers regarding post natal exercise and the selected demographic variables. Health education was given to the mothers to help improve and upraise the mothers’ knowledge and health.