COVER FOR HEAD-UP DISPLAY DEVICE, AND HEAD-UP DISPLAY DEVICE

The utility model provides a cover for a head-up display (HUD) device and the HUD device, wherein the cover can restrain thermal deformation of the cover caused by light absorption. A cover (60) for an HUD device is provided with a translucent plate-shaped part (61) and a layered part (62) provided on the lower surface side of the plate-shaped part (61). The layered section (62) is provided with: a mask layer (70) in which an opening (70a) is formed; and a low-light-absorption layer (80) which is provided on the lower surface side of the mask layer (70) and which has a lower absorbance than the mask layer (70). A region inside the opening (70a) in the plate-shaped section (61) is a transmissive region (60a) through which the display light passes. The low light absorption layer (80) has a light receiving section (81) that is provided in at least a part of the periphery of the opening (70a) and that receives light from the lower surface side. The light receiving unit (81) is positioned closer to the exit port (