A purpose is to obtain a frequency characteristic of a good sound pressure. To achieve the purpose, an acoustic generator according to an embodiment includes a piezoelectric element (exciter), a flat vibrating body, and a resin layer. The piezoelectric element vibrates when an electric signal is input. To the vibrating body, the piezoelectric element is attached. The vibrating body vibrates with the piezoelectric element due to the vibration of the piezoelectric element. The resin layer is arranged to cover surfaces of the piezoelectric element and the vibrating body to which the piezoelectric element is attached. The resin layer is integrated with the vibrating body and the piezoelectric element. Also, to the resin layer, irregularity is provided.