A nebulizer and a housing part for a nebulizer are proposed, wherein a container containing the fluid to be nebulized is provided. The container is moveable back and forth for conveying and nebulization of the fluid. A securing device forms a transportation lock for holding the container unmovable in a delivery state with closed transportation lock. A control part opens the transportation lock by means of at least one rib or arm when the control part is moved towards the securing device. The securing device comprises a ring-like holding part with inwardly extending holding elements for holding the container inseparably.
