A medical nebulizer with improved structure, the medical nebulizer comprising a first housing and a second housing, the first housing integrally formed a first nozzle, the first nozzle has a first nozzle hole, the second housing integrally formed a second nozzle and a conical cover, the second nozzle has a second nozzle hole, the inside of the conical cover has a protrusion and an annular inclined surface, the protrusion formed a impacting surface to produce aerosol wherein the second housing is separable assembled to the first housing, the second nozzle is located on the outside of the first nozzle, a fluid passage is formed between the first nozzle and the second nozzle, the first nozzle hole is located on the inside of the second nozzle hole, the impacting surface is located above the second nozzle hole.
