Anterior cruciate ligament (ACL) rupture is a common injury of the knee. Arthroscopic ACL reconstruction is a standard treatment for this condition. All-inside ACL reconstruction has many advantages compared with conventional techniques. However, there are still concerns regarding graft elongation and stability with all-inside ACL reconstruction. Here, we propose an arthroscopic technique using the shortening strands of a flexible suspensory button as an internal brace. This method provides the advantages of increased stability and ACL graft protection while using the same implant as the all-inside ACL reconstruction technique.