To provide a jet device of an aerosol container, which enables a switching of three operations of a normal spray, lock, and degassing by the same procedure.

The jet device comprises a depressing head 12 with a nozzle 20 and a double cylindrical shoulder cover 30 surrounding the depressing head, and provides: a means 80 for positioning a rotation direction which guides a circumferential position of the depressing head 12 to a first position for the normal spray, a second position locked in which the drop is impotent, and a third position for degassing; a means 84 for controlling the depressing, which enables the depressing of the depressing head 12 when the depressing head 12 is at the first and the third positions, and controls the depressing when the depressing head 12 is at the second position; and a stopper means 82 which locks the depressing head 12 dropping up to a certain height at the concerned height when the depressing head 12 is at the third position.