A head-up display comprising: a polarizing member comprising a polarizing plate; a display unit that outputs an image; and a housing that houses the display unit therein, wherein the polarizing member is used as a transparent cover that transmits the image to outside of the housing, and the polarizing member proiects. as a projected image' a virtual image of said image that has passed through the polarizing plate characterized in that the polarizing member comprises: the polarizing plate having a polarizer and using a neutrally colored dye-based polarizing material comprising an azo compound and/or a salt of the azo compound, the polarizer prepared from a stretchable PVA film and being positioned so that its polarization direction is parallel to a polarized light output from a display unit and passing through the polarizing member; a first support plate that is laminated with a front surface of the polarizing plate via an adhesive layer; and a second support plate that is laminated with a rear surface of the polarizing plate via an adhesive layer; wherein the first support plate and the second support plate are laminated to the polarizing plate so as to form a structure that is symmetric in a plate thickness direction; and the first support plate and the second support plate are polycarbonate plates, the thickness of each being 50 μm or thicker. a polarizing member comprising a polarizing plate; a display unit that outputs an image; and a housing that houses the display unit therein, wherein the polarizing member is used as a transparent cover that transmits the image to outside of the housing, and the polarizing member proiects. as a projected image' a virtual image of said image that has passed through the polarizing plate characterized in that the polarizing member comprises: the polarizing plate having a polarizer and using a neutrally colored dye-based polarizing material comprising an azo compound and/or a salt of the azo compound, the polarizer prepared from a stretchable PVA film and being positioned so that its polarization direction is parallel to a polarized light output from a display unit and passing through the polarizing member; a first support plate that is laminated with a front surface of the polarizing plate via an adhesive layer; and a second support plate that is laminated with a rear surface of the polarizing plate via an adhesive layer; wherein the first support plate and the second support plate are laminated to the polarizing plate so as to form a structure that is symmetric in a plate thickness direction; and the first support plate and the second support plate are polycarbonate plates, the thickness of each being 50 μm or thicker. the polarizing plate having a polarizer and using a neutrally colored dye-based polarizing material comprising an azo compound and/or a salt of the azo compound, the polarizer prepared from a stretchable PVA film and being positioned so that its polarization direction is parallel to a polarized light output from a display unit and passing through the polarizing member; a first support plate that is laminated with a front surface of the polarizing plate via an adhesive layer; and a second support plate that is laminated with a rear surface of the polarizing plate via an adhesive layer; wherein the first support plate and the second support plate are laminated to the polarizing plate so as to form a structure that is symmetric in a plate thickness direction; and the first support plate and the second support plate are polycarbonate plates, the thickness of each being 50 μm or thicker.