Abstract: A shelf connector assembly including cooperating dove-tail connector members respectively attached to the shelf and an upright post, in which the connector members are provided with mating tapering flanges for cooperative longitudinal slidable locking engagement in selective elevated positions along the post for varying the height of the shelf relative to the post or posts.One dove-tail connector member may be permanently secured to the side frame of the shelf, while the other connector member is in the form a a U-shaped clip member adapted to slip fit around the upright post in various vertical positions.In a modified form of the shelf connector assembly, one cooperating dove-tail connector member may be attached to the shelf while the other dove-tail connector member, in the form of a clip, may be affixed to the transverse outer frame member of an adjacent shelf so that two adjacent shelves may be connected together in a coplanar relationship.