Purpose <p>Anterior shoulder instability with a capsulolabral complex deficiency is a complex pathology to resolve in elderly patients or patients with comorbidities. This study aimed to describe a novel surgical technique for tenodesis of the upper two-thirds of the subscapularis tendon at two levels, at the anterior edge of the glenoid cavity and at its original insertion on the lesser tuberosity, to treat this situation.</p> Materials and methods <p>We describe our technique of open partial tenodesis of the subscapularis tendon for patients over 60 years of age or younger with significant comorbidities, in which 8 patients with chronic anterior shoulder instability underwent surgery. Functional results were evaluated by means of the Neer scale modified by Cofield and the Rowe Score, as well as complications, recurrences and need for reintervention.</p> Results <p>The mean age of the patients was 76.1 (± 13.2) years with 7 excellent results according to the Neer scale modified by Cofield and only 1 satisfactory. In the Rowe Score, 7 patients obtained an excellent result and 1 good with 94.4 (± 5.6) points on average. No complications or recurrences were observed during follow-up, which was between 1 and 12 years with a mean of 3.6 (± 3.5) years.</p> Conclusions <p>In these 8 patients this study demonstrates that our surgical technique achieves excellent clinical results without complications in elderly patients with chronic anterior glenohumeral instability and a deficient or absent anterior capsulolabral complex.</p> Level of evidence IV <p>Case series with no comparison group.</p>