Abstract: This invention provides a muffling panel of a new-type lightweight construction having a function of effectively excluding sounds in low and medium sound ranges and high muffling and sound-absorbing properties in a relatively low frequency band area, and also having at least two parallel diaphragms, a frame body for fixing of the diaphragms and a vibration transmitting mechanism which links to the diaphragms and can mechanically transmit reverse phase vibration, wherein the vibration transmitting mechanism converts vibration of one of the diaphragms which vibrates when receiving a sound into reverse phase vibration thereof to transmit it to the other of the diaphragms, thus causing the other of the diaphragms to displace inward or outward and vibrate simultaneously with one of the diaphragms according to vibration energy of the above original sound.