We report a case of 1-stage ipsilateral shoulder and elbow arthroplasty after comminuted fractures of both joints in a 77-year-old woman. The postoperative course was uneventful, and the patient showed prompt functional improvement and a good clinical result. Despite the higher risk of periprosthetic humeral fracture in cases of ipsilateral shoulder and elbow arthroplasty, the 1-stage procedure may be a promising and reliable solution for the treatment of complex upper limb fractures in elderly inactive patients.