An optical position detection device, includes: a light source adapted to emit at least one detection light beam toward one side in a Z-axis direction; a first detector having a light receiving section directed to the one side in the Z-axis direction; a second detector located at a position on the one side in the Z-axis direction, the position being distant from the light source and the first detector, and having a light receiving section directed to the one side in the Z-axis direction; and a position derivation section adapted to derive a position of a object located in a first space between the first detector and the second detector and a position of a object located in a second space on the one side of the second detector in the Z-axis direction based on a light receiving result in the first detector and the second detector.