A thermoacoustic device includes a sound wave generator, a plurality of first electrodes, a plurality of second electrodes, a first network and a second network. The sound wave generator includes a first surface and a second surface. The plurality of first electrodes are disposed on the first surface. The plurality of second electrodes are disposed on the second surface. The first electrodes and the second electrodes are alternately arranged. Each of the first network and the second network includes a plurality of conducting wires. The plurality of first electrodes are connected together by the plurality of conducting wires in the first network. The plurality of second electrodes are connected together by the plurality of conducting wires in the second network.