To provide a control valve type lead-acid storage battery with a control valve which works either direction of increasing or decreasing pressure and is easily applicable to cylindrical valve seat of a cap type valve which is most presently applied and does not need to change the valve seat structure of a lid.

The cap type valve has a cylindrical part 4 which communicate between the inside of the battery and the outside. A cylindrical stopper 5 having an air hole on the side wall is inserted into the cylindrical part 4, which makes possible to control the valve to both directions of increasing and decreasing pressure. This is immediately applicable to a control valve type lead-acid storage battery with a conventional cylindrical valve seat 2a.

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