An information provision device and an information provision method. Each of the information provision device and information provision method includes projecting an image light to a light transmission member so as to display a for-driver information image, sensing a relative distance of an object to be detected existing around the mobile object in the direction of travel, detecting a location of a viewpoint of the driver, and changing a position at which an object image indicating the object to be detected is displayed according to a result of the detecting so as to change a perception distance of the driver influenced by a motion parallax of the object image according to the relative distance of the object to be detected in the direction of travel.