The present invention relates to a side mirror, and more particularly to a side mirror which is fixed by a supporting base 87 of a vehicle body and a reflecting mirror 87 which is fixed inside the side mirror main body 82 by a supporting base 87, A plurality of injection nozzles 88 arranged at regular intervals and formed with a spray hole 89 directed downward on a front upper surface of the side mirror main body 82 of the side mirror 80, A supply pipe 86 connected to the injection nozzle 88 for supplying compressed air and cleaning liquid to the supply pipe 86 and two side mirrors 80 coupled to the supply pipe 86 for branching from one line to two lines, A venturi tube 60 connected to the supply line 70 and spraying the cleaning liquid to the compressed air supplied thereto and a compressed air line 22 connected to the other end of the venturi tube 60, To compress the high-pressure compressed air (50) for supplying a cleaning liquid through a cleaning liquid line (52) connected to a concave portion of the venturi pipe (60), and a cleaning liquid reservoir Which is a device for removing foreign substances on a side mirror, which is composed of a controller 10 for supplying a cleaning liquid and a cleaning liquid to a surface of a reflecting mirror at the same time, thereby effectively removing foreign substances on the reflecting mirror.
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