Abstract: An information acquiring device includes a projecting portion which projects a laser light emitted from a laser light source onto a target area, and a light receiving portion which receives the laser light reflected on the target area. The light receiving portion includes a color image sensor. The color image sensor has characteristics such that a detection sensitivity of a pixel that detects light of a predetermined color gradually decreases, and detection sensitivities of pixels that detect light of colors other than the predetermined color respectively have local maximum values on a long wavelength side than a visible light region, the detection sensitivities of the respective pixels substantially coinciding with each other in a wavelength band near a wavelength at which the local maximum values are given. An emission wavelength of the laser light source is set to a wavelength in the wavelength band.