Abstract: A back view mirror assembly comprises, a first casing mounted on the rear top of a vehicle body, a convex mirror for reflecting the back view of the vehicle, first means for holding the convex mirror movably mounted in the first casing and capable of extending the convex mirror out of the first casing and beyond the rear top end of the vehicle body so that the reflection from the convex mirror can cause the driver to see the back view, and first means for operating the first holding means to longitudinally move inward and outward so that the convex mirror can be stowed when not in use and can be extended outward when in use. Alternatively, the assembly may comprise two casings, one being at the rear top end and other being at the front top end of the vehicle body. A mirror is further provided in the front casing for reflecting the rays emerging from the convex mirror.