Provided are a similar medical case search device, a similar medical case search method, and a similar medical case search program, with which an appropriate similar medical case is retrieved quickly on the basis of multiple regions of interest. A similar medical case server (17) is equipped with an individual similarity calculation unit (65), an integrated similarity calculation unit (66), and a similar medical case search unit (67). The individual similarity calculation unit (65) associates, in a one-to-one correspondence, regions of interest and multiple medical case lesions existing in a medical case image, compares a feature amount of the associated region of interest and a feature amount of the associated medical case lesions, and calculates an individual degree of similarity for each region of interest. The integrated similarity calculation unit (66), which calculates an integrated degree of similarity on the basis of the multiple individual degrees of similarity calculated individually for the multiple regions of interest, calculates the integrated degree of similarity using the individual degrees of similarity only for a complete-type combination, which is formed by combining each of multiple regions of interest and multiple medical case lesions of different types in the same medical case. The similar medical case search unit (67) searches for similar medical cases on the basis of the integrated degree of similarity corresponding to the complete-type combination.L'invention concerne un dispositif de recherche de cas médical similaire, un procédé de recherche de cas médical similaire, et un programme de recherche de cas médical similaire, avec lesquels un cas médical similaire approprié est retrouvé rapidement sur la base de multiples régions d'intérêt. Un serveur de cas médical similaire (17) comprend une unité de calcul de similarité individuelle (65), une unité de calcul de similarité intégrée (66) et une unité de recherche de cas médical similaire (67).
