Abstract: A passive emission fragrance delivery mechanism/diffuser assembly which includes an outer tubular housing body that carries an inner movable piston and fragrance carrier/diffusion member for selectively dispensing a non-spray fragrant emission upon axial movement of the piston within the tubular housing. The fragrance diffusion member includes a scent-impregnated material which may be movable with the piston or stationery relative thereto within the outer body. The piston is longer than the outer tubular body, so as to always extend beyond the confines of the outer body through one of its open ends. The piston is constructed with an interference fit with the housing body so as to seal the fragrance carrier member therein when not in use.