An instrument lighting device comprising: a circuit board formed of a hard material, an instrument body arranged on the circuit board and having a drive shaft extending toward the front, an indicating needle mounted on a distal end side of the drive shaft, a display panel arranged between the indicating needle and the circuit board and having markings corresponding at least to the indicating needle, a luminance source arranged on the front side of the circuit board and configured to light at least the markings, an instrument housing arranged between the display panel and the circuit board, a cylindrical portion of the instrument housing and formed in to a frame shape so as to surround the drive shaft, a reflecting surface portion provided on the instrument housing and configured to irradiate the display panel with light from the luminous source a reflecting wall portion provided on the instrument housing and arranged so as to face the luminous source for reflecting and guiding the light from the luminous source toward the reflecting surface portion, characterized in that the reflecting wall portion includes a semi-circular inverted conical-shaped first reflecting wall portion configured to light mainly the markings existing in a first marking area near the luminous source, and a second reflecting wall portion formed into a curved surface or a flat inclined surface continuing from end portions of the semi-circular shape of the first reflecting wall portion and provided in a substantially V-shaped cross-section for lighting mainly the markings existing in a second marking area farther from the first marking area. a circuit board formed of a hard material, an instrument body arranged on the circuit board and having a drive shaft extending toward the front, an indicating needle mounted on a distal end side of the drive shaft, a display panel arranged between the indicating needle and the circuit board and having markings corresponding at least to the indicating needle, a luminance source arranged on the front side of the circuit board and configured to light at least the markings, an instrument housing arranged between the display panel and the circuit board, a cylindrical portion of the instrument housing and formed in to a frame shape so as to surround the drive shaft, a reflecting surface portion provided on the instrument housing and configured to irradiate the display panel with light from the luminous source a reflecting wall portion provided on the instrument housing and arranged so as to face the luminous source for reflecting and guiding the light from the luminous source toward the reflecting surface portion, characterized in that the reflecting wall portion includes a semi-circular inverted conical-shaped first reflecting wall portion configured to light mainly the markings existing in a first marking area near the luminous source, and a second reflecting wall portion formed into a curved surface or a flat inclined surface continuing from end portions of the semi-circular shape of the first reflecting wall portion and provided in a substantially V-shaped cross-section for lighting mainly the markings existing in a second marking area farther from the first marking area.