Abstract: An anti-glare rearview mirror assembly for a motor vehicle has a bracket assembly mounted on one end of an external support member with the other end thereof coupled to a vehicle body, a housing molded of resin and swingably supported on the bracket assembly, a prismatic mirror fitted in an inner peripheral edge of the housing, and an operating tab coacting with the bracket assembly for angularly moving the housing with respect to the bracket assembly to shift the mirror between day and night positions. The bracket assembly comprises a block and a resilient small plate, one of which has convex portions or projections. When the housing is moved or flexed with respect to the block under external forces applied, the convex portions or projections engage the rear surface of the mirror to prevent the block and the housing from being released from mutual engagement. The convex portions or projections are positioned near an area where the external support member and the bracket assembly are coupled.