A mounting base portion having a plurality of solenoid valve mounting areas is formed on an upper face of a manifold base. A board having an opening portion is mounted onto the manifold base with the mounting base portion fitted in the opening portion and projecting upward from the board. Solenoid valves are mounted to the respective mounting areas. Solenoid portions of the respective solenoid valves extend over the board from the mounting base portion to cover an upper face of the board.