Head and neck cancer is prevalent in Taiwan, and oral cancer is the most common location. Patients with advanced stage of the disease need extensive tumor excision with neck dissection. Secondary reconstructive surgeries using free flap could improve the postoperative function or appearance of cancer survivors. Oral functions include respiration, speech, mastication, deglutition, and cosmetics. Advanced treatments make survival rates increased, but might develop shoulder dysfunction, speech, mastication, donor site morbidity and psychological issues. The purpose of this project is to explore the effects of rehabilitation following reconstructive surgery in oral cancer survivors.