Abstract: A fish fillet board is adapted to stand upright during use, and to collapse into a folded position during storage. The fillet board comprises two planar surface members, hingedly connected at their upper surface, with smooth outer surfaces for fillet, cleaning and cutting fish. The two planar surface members comprise rough inner surfaces for preventing slippage while gutting fish preparatory to subsequent filleting. The surface members may double as housings for cutting instruments. A plurality of stabilizing spikes arrayed across the medial axis of the fillet board pierce the fish and help prevent slippage during filleting in the upright position.