Abstract: An aquarium pump includes an air-delivery silencer connected with an air-pumping device encased in two covers mounted on a base portion having a silencing box provided with a plurality of sinuous air passages in the box for reducing a sound transmission speed and pressure of sound wave caused by the operating pump for greatly reducing its noise, and a metal plate embedded in a bottom plate formed in the base portion having a plurality of spring-like cushioning supporting legs secured under the bottom plate for further reducing vibrations caused by the operating pump for preventing noise pollution from an aquarium pump.