PROBLEM TO BE SOLVED: To provide a volatilization vessel which can prevent volatilization at circulation and a non-use, and can be volatilized by a one-touch operation at a use, in a two-way type volatilization vessel having both a volatilization body and a spray pump.SOLUTION: In a volatilization vessel 1, there are arranged an annular accommodation step part S which is attached to a mouth part 11 of a vessel main body 10, and into which a volatilization body 50 is accommodated, an attachment body 40 having a male screw part 46a formed at an external peripheral side of the accommodation step part S, and an opening/closing body 60 which is vertically arranged so as to freely advance and retreat via a female screw part 62a which is screwed to the male screw part 46a of the attachment body 40. In the opening/closing body 60, there are arranged a penetration hole 66 which discharges chemicals volatilized from the volatilization body 50 due to the release of a route between the volatilization body 50 and itself in an advance state to a vertical direction to the outside, and in which the route between the volatilization body 50 and itself is a retreat state to a lower direction is blocked, and an attachment cylinder part 67 attached with a spray pump 70.
