Abstract: The invention relates to a gunnery training device using a weapon (1), said device being characterised in that it comprises video capturing means (5) for capturing the field of vision, angular capturing means for detecting angles defining the position of insertion of the synthesis images, processing means (21, 22) for inserting, in real-time, synthesis images into the captured field of vision, and means for visualising (6) the captured field of vision containing said at least one inserted synthesis image.