A manifold includes multiple first valve mount portions, on each of which three electromagnetic valves are arranged side by side, or a plurality of second valve mount portions, on each of which two electromagnetic valves are arranged side by side, or includes at least one of the first valve mount portions and at least one of the second valve mount portions. Waterproof covers are attached to the valve mount portions of the manifold to each cover the three or two electromagnetic valves mounted on the valve mount portion. Thus, a waterproof manifold electromagnetic valve is formed.