An electro-optical distance meter comprising: a first light source configured to emit distance-measuring light toward a measuring object; a first light receiving unit including a first light receiving element configured to receive the distance-measuring light reflected by the measuring object and convert the distance-measuring light into a distance-measuring signal, and a first received light amount adjusting means configured to adjust a light amount entering the first light receiving element; a first objective lens configured to condense the reflected distance-measuring light to the first light receiving unit; a first arithmetic control unit configured to calculate a distance to the measuring object from an initial phase of the distance-measuring signal; and characterized by a first storage unit configured to store the distance-measuring signal, distance value data, and an optical noise signal, and configured to measure an electrical noise signal by putting the first received light amount adjusting means into a state where the first received light amount adjusting means completely blocks light and causing the first light source to emit light, measure a distance-measuring signal of the measuring object by putting the first received light amount adjusting means into a proper state, and calculate a distance by subtracting the electrical noise signal and the optical noise signal from the distance-measuring signal, wherein the first arithmetic control unit measures a first noise signal by putting the first received light amount adjusting means into a state where the first received light amount adjusting means completely blocks light and causing the first light source to emit light with a noise measuring jig having a unique jig-derived noise signal attached, the noise measuring jig being attachable to and detachable from the electro-optical distance meter and configured to remove reflected distance-measuring light entering the first light receiving unit when attached, measures a second noise signal by putting the first received light amount adjusting means into a state where the first received light amount adjusting means transmits light most and causing the first light source to emit light in a state where the noise measuring jig is attached, and calculates the optical noise signal by subtracting the first noise signal and the jig-derived noise signal from the second noise signal, and stores the optical noise signal in the first storage unit. a first light source configured to emit distance-measuring light toward a measuring object; a first light receiving unit including a first light receiving element configured to receive the distance-measuring light reflected by the measuring object and convert the distance-measuring light into a distance-measuring signal, and a first received light amount adjusting means configured to adjust a light amount entering the first light receiving element; a first objective lens configured to condense the reflected distance-measuring light to the first light receiving unit; a first arithmetic control unit configured to calculate a distance to the measuring object from an initial phase of the distance-measuring signal; and characterized by a first storage unit configured to store the distance-measuring signal, distance value data, and an optical noise signal, and configured to measure an electrical noise signal by putting the first received light amount adjusting means into a state where the first received light amount adjusting means completely blocks light and causing the first light source to emit light, measure a distance-measuring signal of the measuring object by putting the first received light amount adjusting means into a proper state, and calculate a distance by subtracting the electrical noise signal and the optical noise signal from the distance-measuring signal, wherein the first arithmetic control unit measures a first noise signal by putting the first received light amount adjusting means into a state where the first received light amount adjusting means completely blocks light and causing the first light source to emit light with a noise measuring jig having a unique jig-derived noise signal attached, the noise measuring jig being attachable to and detachable from the electro-optical distance meter and configured to remove reflected distance-measuring light entering the first light receiving unit when attached, measures a second noise signal by putting the first received light amount adjusting means into a state where the first received light amount adjusting means transmits light most and causing the first light source to emit light in a state where the noise measuring jig is attached, and calculates the optical noise signal by subtracting the first noise signal and the jig-derived noise signal from the second noise signal, and stores the optical noise signal in the first storage unit.