has laser beam receiver 41 which is a photodetector that receives an infrared ray separated by the first optical member 33 at a position near the inner wall on the side where laser diode 17 is placed main body 10 further has range finding means not shown in the figures for measuring the distance between the observer and the object based on the length of time from the emission of an infrared ray with laser emitter 17 to the receiving thereof with laser beam receiver 41 for the range finding means may be used known means these means are taught by for example japanese translated pct application publication no 10 512954 1998 u s pat nos 5 574 552 5 612 779 5 623 335 5 652 651 or 5 740 952 as shown in fig4 and 6 measured distance displaying means 45 is placed at a position above the optical axis of the first ocular optical system 32 the position being off the optical path of the first observation optical system 30 fig4 is a schematic illustration of that part shown in fig1 3 which includes measured distance displaying means 45 reticle 40 and the first ocular optical system 32 measured distance displaying means 45 comprises lcd means 42 connected with the range finding means for displaying the distance between the observer and the object measured by said range finding means and relay lens 43 and reflecting mirror 44 which comprise a displaying optical system for projecting the distance displayed by said lcd means on reticle 40 in this application the abbreviation u201c lcd u201d means liquid crystal display an image made by lcd means 42 is projected onto reticle 40 through relay.