The shoulder is the most mobile joint in our body thanks to the abundance of the joint capsule and the disproportion of the joint bodies. However, this also makes it a very unstable joint, and the immobility of this joint causes a very significant disability. Slap lesion is one of the frequent injuries that we encounter in shoulder injuries. A slap lesion is described as a lesion of the anterior part of the glenoid labrum with tearing and damage to the long head of the bicipital tendon. The lesion is located in the area where the biceps tendon attaches to the labrum, and extends forward to half of the glenoid. Slap lesion is classified into 4 types. Type I lesions show degeneration or wear of the superior labrum while the biceps tendon is preserved. In type II lesions, which are also the most common, the labrum is worn and degeneration is visible as in type I lesions; however, the labrum and biceps are separated from the superior aspect of the glenoid. A type III lesion has a bucket handle tear of the labrum that is similar to a meniscal tear of the knee, but in which the other structures are preserved. Type IV lesion is the rarest, it is also a bucket handle rupture of the labrum and biceps tendon where the remaining part of the biceps tendon is also involved. The injury is most often caused by a direct fall on the shoulder, a sudden pulling of the arm andfrequent repetitions of movements above the head where the tendon is tensed. Patients mostly complain of mechanical disturbances and pain in the form of sticking, crushing and skipping in the shoulder. Treatment of slap lesion can be conservative or surgical. There are a number of clinical tests that are performed to try to diagnose this injury, but sometimes shoulder injuries are difficult to isolate and further tests such as an MRI are needed to help with the diagnosis.