An implant surgical guide apparatus includes a bone pen which is standardized by various diameters based on mesio-distal distances of natural teeth so that an implant can be placed at the center of a prosthetics, and comprises a cup having a rotatably symmetrical shape and a pen coupled to the cup and drilling into an alveolar bone so that the implant can be guided to a position with an angle as desired by an operator when the implant is placed in the alveolar bone corresponding to tooth loss.