A linear oscillatory actuator includes a magnetic pole forming portion that includes an electromagnet and a base, magnetic blocks each of which includes a magnet attracted or repelled by the electromagnet to reciprocate, elastic suspensions for supporting the magnetic blocks, and at least one coupling spring portion that couples the magnetic blocks reciprocatably. Each of the elastic suspension includes upper and lower extending portions, and elastic planar portions integrally provided between the upper extending portions and the lower extending portions, respectively. Depressed portions are formed at continuous portions between the upper extending portions and the elastic planar portions, respectively, and each of the depressed portions is depressed toward the magnetic blocks. While the magnetic blocks reciprocate, Stress concentration on the continuous portions can be mitigated by the depressed portions. Therefore, the elastic planar portions can be prevented from being damaged without becoming large in size.