A head-up display for a vehicle, comprising: a mirror unit comprising a first mirror for reflecting first and second image lights toward a windshield of the vehicle; wherein the mirror unit comprises: an image generator configured to emit light linearly-polarized in a first direction, and light linearly-polarized in a second direction orthogonal to the first direction; a second mirror disposed to be separated from the first mirror so as to transmit the light linearly-polarized in the first direction, and reflect the light linearly-polarized in the second direction to the first mirror; a third mirror disposed to be separated from the second mirror so as to reflect the light linearly-polarized in the first direction that has transmitted through the second mirror to the first mirror; a display layer located at the windshield of the vehicle to display a first virtual image corresponding to the first image light in a first region, and display a second virtual image corresponding to the second image light in a second region; and a controller configured to reflect the first image light and second image light toward the windshield to display the first virtual image and the second virtual image, wherein a distance of the first virtual image from the windshield recognized by the eyes of a driver in the vehicle is different from a distance of the second virtual images from the windshield recognized by the eyes of the driver. a mirror unit comprising a first mirror for reflecting first and second image lights toward a windshield of the vehicle; wherein the mirror unit comprises: an image generator configured to emit light linearly-polarized in a first direction, and light linearly-polarized in a second direction orthogonal to the first direction; a second mirror disposed to be separated from the first mirror so as to transmit the light linearly-polarized in the first direction, and reflect the light linearly-polarized in the second direction to the first mirror; a third mirror disposed to be separated from the second mirror so as to reflect the light linearly-polarized in the first direction that has transmitted through the second mirror to the first mirror; a display layer located at the windshield of the vehicle to display a first virtual image corresponding to the first image light in a first region, and display a second virtual image corresponding to the second image light in a second region; and a controller configured to reflect the first image light and second image light toward the windshield to display the first virtual image and the second virtual image, wherein a distance of the first virtual image from the windshield recognized by the eyes of a driver in the vehicle is different from a distance of the second virtual images from the windshield recognized by the eyes of the driver. an image generator configured to emit light linearly-polarized in a first direction, and light linearly-polarized in a second direction orthogonal to the first direction; a second mirror disposed to be separated from the first mirror so as to transmit the light linearly-polarized in the first direction, and reflect the light linearly-polarized in the second direction to the first mirror; a third mirror disposed to be separated from the second mirror so as to reflect the light linearly-polarized in the first direction that has transmitted through the second mirror to the first mirror; a display layer located at the windshield of the vehicle to display a first virtual image corresponding to the first image light in a first region, and display a second virtual image corresponding to the second image light in a second region; and a controller configured to reflect the first image light and second image light toward the windshield to display the first virtual image and the second virtual image, wherein a distance of the first virtual image from the windshield recognized by the eyes of a driver in the vehicle is different from a distance of the second virtual images from the windshield recognized by the eyes of the driver.