The present invention relates to a vehicle room mirror, wherein a half mirror (2) is provided in the mirror housing (1), and the space (S) formed by the half mirror (2) and the mirror housing (1) is blocked by light. It is divided into first and second spaces S1 and S2 through the plate 3, and displays the distance between the vehicle and the rear object on the inner side of the mirror housing 1 forming the first space S1. LCD lamp panel (4) is provided, the vehicle and the rear object in accordance with the signal detected by the LCD lamp panel driver (5) and the object sensor 7 installed in the rear of the vehicle, the LCD lamp panel (4) The controller 6 which calculates the distance and controls the LCD lamp panel driver 5 to display a signal according to the calculated distance to the LCD lamp panel 4 is electrically connected to the object approaching from the blind spot. Is detected by the object detecting sensor (7) and the distance is displayed on the LCD lamp panel. Since the display contents can be recognized through the half mirror 2, the driver can cope with the collision with the rear object approaching in advance and prevent the safety accident.
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