A virtual image presentation system comprising: a projection unit adapted to project an image display light toward a virtual image presentation plane in a vehicle, wherein the virtual image presentation plane is a windshield of the vehicle or a combiner, to presents a virtual image to a driver; an acquisition unit adapted to acquire information for identifying a position of an object outside the vehicle; an identification unit adapted to generate information for identifying relative positions of the object and the vehicle, based on the information acquired by the acquisition unit; and a virtual image position adjustment unit adapted to adjust a position to present the virtual image as viewed from the driver, based on the information generated by the identification unit, wherein the acquisition unit includes an imaging device that is provided at a position in which it is possible to capture an image including both the virtual image presented on the virtual image presentation plane and a lane line (82, 84) that extends along a traffic lane that the vehicle travels, and that is adapted to capture an image of a scene in front of the vehicle, including both the virtual image presented on the virtual image presentation plane and the lane line (82, 84), wherein the identification unit is adapted to generate the information for identifying relative positions of the virtual image and the lane line from the image captured by the imaging device, and wherein the virtual image position adjustment unit is adapted to adjust the position to present the virtual image, based on the information generated by the identification unit and identifying the relative positions of the virtual image and the lane line. a projection unit adapted to project an image display light toward a virtual image presentation plane in a vehicle, wherein the virtual image presentation plane is a windshield of the vehicle or a combiner, to presents a virtual image to a driver; an acquisition unit adapted to acquire information for identifying a position of an object outside the vehicle; an identification unit adapted to generate information for identifying relative positions of the object and the vehicle, based on the information acquired by the acquisition unit; and a virtual image position adjustment unit adapted to adjust a position to present the virtual image as viewed from the driver, based on the information generated by the identification unit, wherein the acquisition unit includes an imaging device that is provided at a position in which it is possible to capture an image including both the virtual image presented on the virtual image presentation plane and a lane line (82, 84) that extends along a traffic lane that the vehicle travels, and that is adapted to capture an image of a scene in front of the vehicle, including both the virtual image presented on the virtual image presentation plane and the lane line (82, 84), wherein the identification unit is adapted to generate the information for identifying relative positions of the virtual image and the lane line from the image captured by the imaging device, and wherein the virtual image position adjustment unit is adapted to adjust the position to present the virtual image, based on the information generated by the identification unit and identifying the relative positions of the virtual image and the lane line.