Background-Shoulder pain is the third most common cause of joint pain following knee pain and low back pain. The pathological disorders that most frequently affect the shoulder are instability, rotator cuff injury, and impingement. Aim: To compare the findings of ultrasound and MRI in the diagnosis of internal derangements of the shoulder. Objectives: To study the role of MRI and ultrasound in shoulder joint pathology and to correlate ultrasound findings with MRI findings. Methods- This was a cross-sectional study of 55 patients performed in the department of Radio-diagnosis on patients referred from OPD/IPD over eighteen months. Ultrasonography was performed using a Voluson E8 ultrasound scanner using an 11 MHz linear probe, Mindray DC80 ultrasound scanner using an 11MHz linear probe and 5.4 MHz-13.5 MHz linear array probe (hockey stick probe).MRI Scan was performed in Siemens Magnetom Essenza 1.5 tesla machine. The patients were selected randomly and the data was analyzed for sensitivity, specificity, predictive values, and accuracy. Results- Out of 55 cases 40 were males and 15 were females. The left side was more involved. MRI was significantly superior to USG in detection of partial thickness tears of rotator cuff tendons. The most commonly involved tendon was supraspinatus, followed by subscapularis. Hill-Sachs lesions, accounting for 50 % of cases, were the most commonly detected lesions in shoulder instability and were clearly demonstrated in both MRI and USG. In our study, USG demonstrated MRI had higher sensitivity compared with USG. Conclusion-Ultrasound is a cost-effective option for detecting full-thickness tears of the rotator cuff tendons, MRI is more effective for identifying partial-thickness tears.