A vapour generating device is arranged to receive solid vapour generating material. The vapour generating device includes a vapour generating chamber which is arranged to contain the solid vapour generating material and a closure for the vapour generating chamber. The closure is arranged to define a first passageway between the exterior of the vapour generating device and the vapour generating chamber when the closure is in a closed position, such that the first passageway allows air to enter the vapour generating chamber.