A noise reduction structure between a power source and a fixing plate includes: a buffer member having a first opening through upper and lower faces of a body, upper lower portions of the buffer member respectively extending transversely to form upper and lower portion extensions with a gap therebetween; a rigid support portion includes an upper plate block having a second opening, a lower plate block having a third opening, and a stop block connecting the upper plate block and the lower plate block, the buffer member being embedded and engaged between the upper and lower plate blocks; a connecting member having a free end provided with an engagement portion engaged within the gap and a fixing end connected onto the fixing plate; and a fixing rod running through the power source, connecting and fixing the support portion and the power source, being separated from the fixing plate.