A closure device for a container with a container opening has a lid element for closing the container opening, a chamber assigned to the lid element and an inner housing. The chamber and the inner housing have closing and opening elements that correspond to one another. The chamber locks with the inner housing, the lock with the inner housing being offset radially inwards in respect of a vertical of the closure device over a greatest width of the chamber in the offset direction. In order to specify a closure device which allows emptying of the chamber as the lid element is removed in an easy-to-handle fashion, with further preferred favorable manufacturability of the closure device, the lock in the vertical direction is designed separately from a shoulder section of the inner housing formed on the base side under the lock.