FLAT SPEAKER

PROBLEM TO BE SOLVED: To provide a flat speaker that is light in weight and has an excellent acoustic characteristic. SOLUTION: The flat speaker shown in a symbol 100 has a support panel member 140 being rigid and a diaphragm 120 that is supported to the support panel member 140 via a vibration exciter 160. The vibration exciter 160 is connected to the diaphragm 160 via a vibration delivery section 170. The diaphragm 120 is structured such that the diaphragm 120 uses a honey-comb core material 124 for a core material, to both sides of which a front side material 122 and a rear side material 126 are adhered by an adhesive 127, an aramid fiber material formed to be a honey-comb core is used for the honey-comb core material 124. A textile resulting from applying 3 axis weaving to carbon fibers is used for the front side material 122 and the rear side material 126. The support panel 140 is structured such that the panel 140 uses a honey-comb core material 144 for the core material and on both sides of which a front side material 142 and a rear side material 146 are adhered by an adhesive 147, an aramid fiber material formed to be a honey-comb core e.g. is used for the honey-comb core material 144. A mesh material of glass fibers is used for the front side material 142 and the rear side material 146.