[Problem] To configure a medical image display device, which displays three-dimensional medical images of a subject and additional information images representing information to be added to the three-dimensional medical images, in such a manner that the additional information images are displayed in a desired color, and the additional information images and three-dimensional medical images are clearly distinguished. [Solution] This medical image display device is provided with: a medical image acquisition means (11) for acquiring three-dimensional images of a subject； a display control means (12) for displaying the three-dimensional medical images acquired by the medical image acquisition means, and additional information images representing information to be added to the three-dimensional medical images； and an additional information display instruction receiving means (13) for receiving instructions for displaying the additional information images in relation to the three-dimensional medical images. The display control means (12) displays the additional information images in relation to the three-dimensional medical images when an instruction to display the additional information images is received, and changes the color of the currently-displayed three-dimensional medical images to a color that can be distinguished from the color of the additional information images.La présente invention vise à résoudre les problèmes liés à la configuration d'un dispositif d'affichage d'images médicales, qui affiche des images médicales en trois dimensions d'un sujet et des images d'informations supplémentaires représentant des informations à ajouter aux images médicales en trois dimensions, de telle manière que les images d'informations supplémentaires sont affichées dans une couleur souhaitée, et les images d'informations supplémentaires et les images médicales en trois dimensions sont clairement distinguées. La présente invention concerne par conséquent un dispositif d'afficha
