Proximal humerus fractures are commonly encountered in orthopaedic practice. They are uncommonly associated with axillary artery injuries, more rarely with delayed presentation of the same. We report an unusual of delayed axillary artery injury following proximal humerus fracture due to displacement of the fracture fragment, despite standard recommended immobilisation. A more rigid immobilisation with a closely supervised physical therapy and awareness for this devastating complication can be life saving.