Abstract: A storeroom bin marker which includes a base member having indicia thereon, and a rotatable view blocking member which can be selectively rotated to cover some, all, or none of the indicia, to thereby indicate the supply or reorder status of a stocked item. The base member has front and top panels at right angles with respect to each other, and is designed to fit over the front and top edges of a storage shelf. The bin marker has mounting holes in its front and top panels which can be used, with an elastic cord member, to secure the bin marker to wire shelves; or which can be used with screws to secure the bin marker to a solid shelf. Alternatively, the bin marker can be adhesively mounted to solid shelves. The front panel of the bin marker is provided with a pair of parallel, spaced apart bin label retainers for releasably holding a replaceable bin label.