Where is it located? The supraspinatus is located in the upper part of the scapula, in the supraspinatus fossa and is inserted into the external face of the humerus (trochiter). If you feel with your hand your shoulder, you will see that it makes a small pit and that if you squeeze in the center it possibly annoys you. That muscle you touch will be the trapeze, much larger, and just below the supraspinatus. Tendon_supraespinoso What is tendonitis.