Holographic device for viewing ultrasound images in three dimensions, comprising: -a support (15), - a projection pyramid (1), fixed to the support (15), comprising three or more sides (11, 12, 13) and a base (14), - three or more projectors (2), fixed to the support (15), which externally project an image onto each of the sides (11, 12, 13) of the projection pyramid (1), - an electronics module (8), connected to the projectors (2), comprising a video signal input (5) intended to receive a video signal (5) from an external device (4) such as an ultrasound scanner, and three or more video signal outputs (81, 82, 83) respectively connected to the projectors (2). (Machine-translation by Google Translate, not legally binding)