The speaker device (100) includes a diaphragm (11), an exciter (13) which vibrates in response to an input electrical signal, and a vibration-transmitter (15) which is connected to both the diaphragm (11) and the exciter (13) and transmits the vibration of the exciter (13) to the diaphragm (11), in which the diaphragm (11) has a loss coefficient at 25° C. of 1×10−2 or higher and the vibration-transmitter (15) has a specific elastic modulus of 20 mm2/s2 or higher.