Autogenous palatal mucosal graft (PMG) has been considered the most predictable grafting material when utilized to increase attached keratinized gingiva. However, several disadvantages have fostered investigators to search for a better alternative during the past 3 decades. All kinds of vital grafts have similar problems as what PMG has had. As for the devitalized grafts, although the clinical results were various, some researchers regarded them as a biologic bandage at best, namely, the devitalized grafts lacked the capability of dominating the specificity of the overlying epithelium. This clinical report introduces a novel material – freeze dried acellular dermal matrix allograft – to serve as a grafting material for the purpose of increasing attached keratinized gingival, and makes some advices to help in raising the predictability of the result.