An improved portable antiglare screen device to be used by the driver of an automobile in combination with an exterior rear view mirror in order to prevent glare to the driver when viewing therethrough. This antiglare screen device detachably mounts onto the upper inboard side of a drivers side door, adjacent a slidable window within the door, and directly opposite the exterior rear view mirror. This antiglare screen device has a base comprising a housing and two integral mounting clips. These mounting clips are wedged down in between the slidable window and elastomeric window seal on the inboard side of the door, adjacent the slidable window, to hold the housing in place after quick installation. A manually operable mechanism, mounted within the housing, provides a collapsible framework device, comprising a duality of elongated support members, to deploy a flexible one-ply mesh. This mesh can be spread within the drivers line-of-sight of his/her exterior rear view mirror, encompassing its perimeter, for viewing the image of trailing vehicles therethrough and attenuating undue glare from the bright headlights of those vehicles. This one-ply mesh can also be retracted by the mechanism back into the housing of the base for storage and can be repeatedly deployed or retracted by the driver with one simple flick of the wrist of one hand.