This resection process estimation device is configured from: a surgery process case database storing case data of surgery processes describing information relating to incision surfaces for resected sites of organs of interest and the procedure for resection; a standard resection process generation unit that reads out case data appropriate for a site to be resected specified by a user from the surgery process case database and generates a standard incision surface and a standard resection process on the basis of a plurality of pieces of read case data; an anatomical reference point extraction unit that extracts an anatomical reference point from patient-specific three-dimensional medical image data; and a patient-specific resection process estimation unit that matches the standard incision surface and the standard resection process to the patient-specific three-dimensional medical image data and estimates a patient-specific incision surface and a patient-specific resection process.
