Background: T4 syndrome is one of the commonest causes for upper back pain leading to pain and dysfunction. The condition being common in physically active persons, it can lead to substantial difficulties in performing their regular and simple activities. It can even affect them psychologically, leading to a depressed life. Aim of the study: To emphasis the effect of maitl and mobilization in patients with T4 Objectives of the study This study is aimed to find out the effect of maitl and mobilization in decreasing pain and functional ability by using VAS (visual analogue scale) and DASH (Disability of the arm shoulder and hand) scale respectively with T4 syndrome. Methods: A quasi-Experimental study conducted in 30 samples. The subject were selected based on convenient sampling technique. Results: Statistical analysis showed there is a significant difference between the pre and post test scores at p<0.001 in terms of functional ability and pain reduction in patients with T4 syndrome. Conclusion: From this study it can be concluded that T4 syndrome can be effectively treated by the Maitland mobilization and there is an improvement in the thoracic mobility, and reduction in pain as concluded by the VAS and DASH scores. Thus it can be concluded that Maitland mobilization is an effective therapeutic option in the treatment of T4 syndrome.