This chapter deals with the brief description on rotator cuff tears. The rotator cuff consists of four tendons i.e. subscapularis (SC), supraspinatus (SS), infraspinatus (IS) and teres minor (TM). All these tendons arise from the scapula and insert upon lesser and greater tuberosity of the humerus. The main function of the rotator cuff is to keep the head of the humerus depressed and centered into the glenoid fossa permitting a single center of rotation while allowing efficient abduction or elevation of the arm. The etiology of rotator cuff tear can be divided into two types which are traumatic tear and non-traumatic or degenerative tear. Small degenerative tears of supraspinatus are well-tolerated functionally as long as the rotator cable is maintained and anterior fibers of supraspinatus tendon remain intact. However, full thickness tear involving complete supraspinatus tendon affects abduction and humeral rotational capability. Natural history of full-thickness cuff tear, classification, clinical features, diagnostic imaging, differential diagnosis, treatment, indications and contraindications, techniques, rehabilitation, and complications of rotator cuff tears have been broadly described in this chapter.