Abstract: Known picture rail apparatus comprises a rail member to be mounted horizontally on the wall, the rail member being formed with a longitudinally-extending slot, and a support member on which a picture or other article can be supported. The support member is provided with a tongue permitting it to be slidingly mounted on the rail member with the tongue slidingly engaged in the slot. In this invention, an inter-engaging surface of one of the tongue and the slot is provided with a longitudinally-extending shoulder which may be in the form of a rib serving to resist withdrawal of the tongue laterally from the slot.