A simple but efficient way to secure the biceps tendon after it has been detached at its upper end by either trauma, attrition or surgical interference is the use of the keyhole in the upper humerus. A tied or rolled knot of tendon inserted into a keyhole shaped opening in the bicipital groove permits firm attachment of the tendon to bone permitting immediate shoulder and elbow motion. Immediate postoperative joint motion avoids aggravation of coexisting shoulder disease and permits early return to work or sports. Use of this procedure in 11 patients with good to excellent results in all confirns its merit.