Provided are a device, a method and a program for controlling image display with which it is possible to display a superimposed image having easy-to-perceive depth information in a superimposed manner on a tissue to be observed in a real space. This device for controlling image display is provided with: an image extraction unit 21 for extracting an image of an tissue to be observed from a three-dimensional image; a distance storage unit 26 for storing information of a distance which is measured from the surface of the tissue to be observed and used to generate a superimposed image; a surface shape acquisition unit 22 for acquiring the surface shape of the tissue to be observed in the real space; an alignment processing unit 23 for performing alignment processing so that the surface shape in the real space and the image of the tissue to be observed satisfy a positional relationship; a superimposed image generation unit 24 for generating a superimposed image on the basis of the image of the tissue to be observed which has been subjected to the alignment processing, and the distance; and a display control unit 25 for displaying the superimposed image in a superimposed manner on the image of the tissue to be observed.L'invention concerne un dispositif, un procédé et un programme de commande d'affichage d'image avec lesquels il est possible d'afficher une image superposée ayant des informations de profondeur faciles à percevoir d'une manière superposée sur un tissu à observer dans un espace réel. Ce dispositif de commande d'affichage d'image comporte : une unité d'extraction d'image 21 pour extraire une image d'un tissu à observer à partir d'une image tridimensionnelle ; une unité de stockage de distance 26 pour stocker des informations d'une distance qui est mesurée à partir de la surface du tissu à observer et utilisée pour générer une image superposée ; une unité d'acquisition de forme de surface 22 pour acquérir la forme de surface du tissu à observer dans l'espace r