Yoga nidra is a systematic way of yogic relaxation mentioned in our classics, later developed by Bihar School of Yoga.Physical, mental and spiritual relaxation can be attained through the conscious and regular practice of yoga nidra.The one-hour practice can help in reducing stress and improve the mental health and well-being of all age people.On comparison with other meditation techniques, Yoga nidra is more effective and research studies suggest that even though meditation and yoga nidra were both effective in lessening anxiety and stress, the results of yoga nidra was more remarkable.Research studies also suggest that yoganidra can be used in reducing the physiological and cognitive symptoms of anxiety.The effect of yoga nidra in various diseases have been proved through many clinical studies which are described in the review.