To listen to excellent sounds while riding on and traveling a motorcycle.

An acoustic generation device 10 comprises: a vibrating element 12 which vibrates in response to a signal to be input; a case body 14 in which the vibrating element 12 is accommodated; and a fixing component 18 for fixing the case body 14 on a plate-like member 35 to be vibrated, wherein the case body 14 includes a bottom plate 34 having a sticking surface 34a on which the vibrating element 12 is supported and vibration of the vibrating element 12 is transferred to the member 35 to be vibrated brought in contact, and a cover 32 disposed on a bottom plate 34 so as to cover the outside of the vibrating element 12. The cover 32 and the bottom plate 34 are assembled while interposing an elastic body 36 therebetween, and the fixing component 18 is assembled with the bottom plate 34.