A dental membrane disposed in a deficient region of an alveolar bone to form a space for regeneration of the alveolar bone or to surround a bone graft, wherein the dental membrane is fixed by an insert inserted and fixed in the alveolar bone and a cover member combined to the insert, the dental membrane including: an upper portion surrounding a top surface of the deficient region of the alveolar bone; and a side bending portion bended downward from the upper portion and surrounding a side surface of the deficient region of the alveolar bone, wherein the upper portion includes: a combined portion combined to the insert and the cover member to be fixed; and a protruding portion extending and protruding upward from the combined portion.