A tissue excisor according to an embodiment of the present invention comprises: an excising part capable of being inserted into a human body and having a structure that can excise human tissue; and an optical signal relay module built into the excising part to be capable of moving forward and backward along the lengthwise direction of the excising part, and providing an optical signal to human tissue, wherein the optical signal relay module preferably collects the optical signal reflected by the human tissue while moving forward and backward along the lengthwise direction and line-scans the human tissue.