A display device for a vehicle comprising: a housing configured to have a light-transmitting unit for transmitting light; a laser light source (11, 12, 13) for emitting laser light; light source driving means for driving the laser light source (11, 12, 13); a scanning unit for generating an image by scanning the laser light; scanning unit driving means for driving the scanning unit; and reflection means for reflecting display light indicating the image in a direction of the light-transmitting unit; the display device being characterized in that it comprises temperature detection means for detecting the temperature of the laser light source (11, 12, 13), wherein the light source driving means causes the laser light source (11, 12, 13) to perform a self-heating drive when the detected temperature that is detected by the temperature detection means is lower than a first threshold value that is determined in advance; and stops the self-heating drive when the detected temperature is above the first threshold value wherein the laser light source (11, 12, 13) performs normal driving to display the display image when the detected temperature is higher than a second threshold value, that is a temperature higher than the first threshold value; and an auxiliary temperature raising means for raising the temperature of the laser light source (11, 12, 13), wherein the auxiliary temperature raising means raises the temperature of the laser light source (11, 12, 13) when the detected temperature is between the first threshold value and a third threshold value that is a temperature higher than the second threshold value, and stops raising the temperature of the laser source when the detected temperature is above the third threshold value. a housing configured to have a light-transmitting unit for transmitting light; a laser light source (11, 12, 13) for emitting laser light; light source driving means for driving the laser light source (11, 12, 13); a scanning unit for generating an image by scanning the laser light; scanning unit driving means for driving the scanning unit; and reflection means for reflecting display light indicating the image in a direction of the light-transmitting unit; the display device being characterized in that it comprises temperature detection means for detecting the temperature of the laser light source (11, 12, 13), wherein the light source driving means causes the laser light source (11, 12, 13) to perform a self-heating drive when the detected temperature that is detected by the temperature detection means is lower than a first threshold value that is determined in advance; and stops the self-heating drive when the detected temperature is above the first threshold value wherein the laser light source (11, 12, 13) performs normal driving to display the display image when the detected temperature is higher than a second threshold value, that is a temperature higher than the first threshold value; and an auxiliary temperature raising means for raising the temperature of the laser light source (11, 12, 13), wherein the auxiliary temperature raising means raises the temperature of the laser light source (11, 12, 13) when the detected temperature is between the first threshold value and a third threshold value that is a temperature higher than the second threshold value, and stops raising the temperature of the laser source when the detected temperature is above the third threshold value.