An optical measurement device that is configured to acquire a measured value based on a received light amount of reflected light reflected by a target (TA), the optical measurement device comprising: a setting part that is configured to set a threshold value for a received light amount per unit time of the reflected light based on feature information regarding a light amount of the optical measurement device ; a determination part that is configured to determine presence or absence of noise in the measured value based on the threshold value to reduce an influence of variation in the light amount inherent in the optical measurement device ; a controller that comprises a light source for emitting light comprising a plurality of wavelength components; a sensor head that comprises an optical system for condensing the reflected light, wherein the optical system is configured to cause chromatic aberration to occur along an optical axis direction for the light, irradiate the target (TA) with the light having the chromatic aberration, and condense the reflected light; and the optical measurement device further comprises a light reception part for detecting the received light amount of the reflected light and configured to be able to detect the received light amount for each of the wavelength components; and a measurement part that is configured to measure a distance from the optical measurement device to the target (TA) as the measured value based on the received light amount of the reflected light, wherein the setting part is configured to set the threshold value based on first feature information regarding a light amount of the controller and second feature information regarding a light amount of the sensor head , and the determination part is configured such that when the determination part determines that there is noise in the distance, the measurement part does not measure the distance. a setting part that is configured to set a threshold value for a received light amount per unit time of the reflected light based on feature information regarding a light amount of the optical measurement device ; a determination part that is configured to determine presence or absence of noise in the measured value based on the threshold value to reduce an influence of variation in the light amount inherent in the optical measurement device ; a controller that comprises a light source for emitting light comprising a plurality of wavelength components; a sensor head that comprises an optical system for condensing the reflected light, wherein the optical system is configured to cause chromatic aberration to occur along an optical axis direction for the light, irradiate the target (TA) with the light having the chromatic aberration, and condense the reflected light; and the optical measurement device further comprises a light reception part for detecting the received light amount of the reflected light and configured to be able to detect the received light amount for each of the wavelength components; and a measurement part that is configured to measure a distance from the optical measurement device to the target (TA) as the measured value based on the received light amount of the reflected light, wherein the setting part is configured to set the threshold value based on first feature information regarding a light amount of the controller and second feature information regarding a light amount of the sensor head , and the determination part is configured such that when the determination part determines that there is noise in the distance, the measurement part does not measure the distance. <EOS>