A side and rear portion sensing device for vehicle

A side and rear portion sensing device for vehicle is provided to automatically output a warning sound when other vehicles exist in a lane to change. A side and rear portion sensing device for vehicle comprises a photographing unit(10) which is installed on the left and right sides of the vehicle to capture images of the side and rear condition, a display unit(20) providing the driver with the images captured by the photographing unit, an image processing unit processing information about the images, and a controller applying a control signal to a window driving unit and a warning sound output unit(60). The image processor analyzes the image information based on the size of the photographed object and transmits a warning sound output signal to the controller when the speed of other vehicles is higher than that of the own vehicle or other vehicles exists within a specified distance from the side of own vehicle.