Abstract: A shelf support assembly formed of particle board is disclosed. The assembly includes a generally right triangular shaped main body having flat upper and inner sections for receiving a shelf and for abutting a wall surface, respectively. The upper section has an indentation at its inner end which receives an L-shaped bracket for use in securing the shelf support to a wall surface. The L-shaped bracket is fixed to the main body by a screw. A second screw extends laterally into the main body in the vicinity of the L-shaped bracket screw and serves to hold the particle board from separating due to the penetration into the body of the L-shaped bracket screw and downwardly directed force on the body. A third screw extends through a lower region of the body between its outer and inner sections for supplementing attachment of the assembly to a wall surface.