An exhaust gas dry treatment device comprises an adsorption tower having: a box-shaped tower body; a plurality of reaction chambers have moving beds therein; a plurality of vertical partition plates which sequentially close between the end parts of the plurality of reaction chambers and between the end parts of the reaction chambers and the inner wall of the tower; an exhaust gas supply port allowing the inside of an inlet side wind box space which is formed in the tower body between the front tower wall and the reaction chamber end part to communicate with the inside of an exhaust gas supply duct; and an exhaust gas discharge port allowing the inside of an outlet side wind box space which is formed in the tower body between the rear tower wall and the reaction chamber end part to communicate with the inside of an exhaust gas discharge duct.