A head-up display device comprising: a display; a housing which is formed with an opening part in an upper face and into which the display is accommodated; a combiner on which display light emitted from the display is incident and which displays a virtual image, with the combiner being movable between a rising-up position where the combiner rises so as to protrude from the opening part and an accommodated position where the combiner is accommodated into an inside of the housing; a shutter mechanism configured to close the opening part; a reflection mirror, which is fixed on a lower face side and a front face side of the housing and configured for reflecting light emitted from the display toward an obliquely rear upper side; a lens which is fixed on an obliquely rear upper side with respect to the reflection mirror in the inside of the housing so that the lens is disposed at a position where light reflected by the reflection mirror is passed; a movable light baffle accommodated in the housing, wherein the light baffle is disposed on a lower side with respect to the combiner with the light baffle being inclined to a rear side toward an upper side when the combiner is located at the rising up-position, and wherein the light baffle is disposed substantially parallel to the lens when the combiner is located at the accommodated position; a turning shaft disposed on an obliquely rear upper side with respect to a lower end of the lens, the turning shaft being disposed with the right and left direction as an axial direction and being fixed at one end in a short widthwise direction of the light baffle; and a motor which is connected with the turning shaft through a coupling so that the light baffle is turnable by power of the motor with the turning shaft as a turning center; wherein the shutter mechanism comprises a belt (35, 36), a belt drive mechanism configured to move the belt (35, 36) in its longitudinal direction, and a plurality of shutter plates for closing the opening part; and wherein a plurality of the shutter plates is formed in a substantially rectangular plate shape whose longitudinal direction is a direction perpendicular to the longitudinal direction of the belt (35, 36) and the shutter plates are fixed to the belt (35, 36) so as to be adjacent to each other in the longitudinal direction of the belt (35, 36). a display; a housing which is formed with an opening part in an upper face and into which the display is accommodated; a combiner on which display light emitted from the display is incident and which displays a virtual image, with the combiner being movable between a rising-up position where the combiner rises so as to protrude from the opening part and an accommodated position where the combiner is accommodated into an inside of the housing; a shutter mechanism configured to close the opening part; a reflection mirror, which is fixed on a lower face side and a front face side of the housing and configured for reflecting light emitted from the display toward an obliquely rear upper side; a lens which is fixed on an obliquely rear upper side with respect to the reflection mirror in the inside of the housing so that the lens is disposed at a position where light reflected by the reflection mirror is passed; a movable light baffle accommodated in the housing, wherein the light baffle is disposed on a lower side with respect to the combiner with the light baffle being inclined to a rear side toward an upper side when the combiner is located at the rising up-position, and wherein the light baffle is disposed substantially parallel to the lens when the combiner is located at the accommodated position; a turning shaft disposed on an obliquely rear upper side with respect to a lower end of the lens, the turning shaft being disposed with the right and left direction as an axial direction and being fixed at one end in a short widthwise direction of the light baffle; and a motor which is connected with the turning shaft through a coupling so that the light baffle is turnable by power of the motor with the turning shaft as a turning center; wherein the shutter mechanism comprises a belt (35, 36), a belt drive mechanism configured to move the belt (35, 36) in its longitudinal direction, and a plurality of shutter plates for closing the opening part; and wherein a plurality of the shutter plates is formed in a substantially rectangular plate shape whose longitudinal direction is a direction perpendicular to the longitudinal direction of the belt (35, 36) and the shutter plates are fixed to the belt (35, 36) so as to be adjacent to each other in the longitudinal direction of the belt (35, 36).