Provided is an image management device capable of extracting images that are useful for diagnosis without omission while also being able to create a backup with a smaller storage volume than in the past. The image management device (1) is provided with: an image storage section (131) for storing image data for a series of images for each test; a display unit (15) for displaying a series of images; an input unit (11) for inputting an operation signal with respect to a displayed image; an operation information storage section (133) for storing information representing an operation on an image that is being displayed correlated with the image that is the object of the operation; an image extraction section (162) for extracting an image group on the basis of the information representing said operation and the correlated images; and a backup image storage unit (17) for storing the image data for the extracted image group. The operation information storage section (133) stores information for operations performed by multiple users that is contained in a single test correlated with the images that were the object of the operations for each user. The image extraction section (162) extracts image groups on the basis of the images correlated with the information on operations performed by multiple users that is contained in a single test.L'invention concerne un dispositif de gestion d'image capable d'extraire des images qui sont utiles pour un diagnostic sans omission, tout en étant capable de créer une sauvegarde avec un volume de mémoire plus petit qu'auparavant. Le dispositif de gestion d'image (1) comprend : une section de mémoire d'image (131) pour mémoriser des données d'image pour une série d'images pour chaque essai ; une unité d'affichage (15) pour afficher une série d'images ; une unité d'entrée (11) pour entrer un signal d'opération par rapport à une image affichée ; une section de mémoire d'informations d'opération (133) pour mémoriser des informations représentan