A nebulizer assembly includes a nebulizer host and an auxiliary flow-guiding element. The auxiliary flow-guiding element is disposed on the nebulizer host. The auxiliary flow-guiding element has an auxiliary flow-guiding channel and at least one auxiliary bottom flow-guiding opening communicating with the auxiliary flow-guiding channel, and the auxiliary bottom flow-guiding opening penetrates through a bottom portion of the auxiliary flow-guiding element. A nebulized fluid generated by the nebulizer host can be sent to the auxiliary flow-guiding channel of the auxiliary flow-guiding element, and an outside air can pass through the auxiliary bottom flow-guiding opening and flow into the auxiliary flow-guiding channel. Therefore, the nebulized fluid in the auxiliary flow-guiding channel can be propelled towards a direction away from the auxiliary bottom flow-guiding opening by the outside air flowing into the auxiliary flow-guiding channel through the auxiliary bottom flow-guiding opening.
