In a manifold valve, a part housing chamber and a fist recessed portion are provided
to a casing of a selector valve, position sensors for detecting an operating position
of a spool are housed in the part housing chamber, a first relay connector connected
to both the position sensors and pilot valves is housed in the first recessed portion,
a second recessed portion corresponding to the first recessed portion and a substrate
housing chamber are provided to a manifold base, a second relay connector to be
electrically connected to the first relay connector by mounting the selector valve
onto a placing face is housed in the second recessed portion, and a main wiring
substrate electrically connected to the second relay connector is housed in the
substrate housing chamber.