To provide an apparatus for cleaning dampening water for mainly small sized or conventional offset printing machines, which is movable to suit request and can effectively remove ink, a paper powder, an oil component or the like mixed in the dampening water.

This portable type apparatus for cleaning the dampening water is equipped with a cylindrical housing for accommodating a filter, a water supply pump for supplying water to the filter and a base table on which the cylindrical housing and the pump are arranged in parallel. The base table can travel with casters provided on the rear face, an inner cylindrical body with the upper surface open is vertically fixed to the center in the cylindrical housing, and the filter is arranged around the cylindrical body in a cylindrical state.