The Venturi scrubber is being used successfully for the removal of micron and submicron particle matter, both in solid or liquid state, from gas streams. The vertical type Venturi scubber has been adopted recently for the large scale installation. Its area requirement is appreciably less than in the horizontal type one, and the behavior of scrubbing spray is affected somewhat by the gravitational force. In the previous report, the motion of spray was calculated analytically. The present paper treats the theoretical studies on collection efficiency by the new method and pressure drop. The results reveal that characteristics of the vertical type Venturi scrubber are slightly excellent than the horizontal type one.