An impact producing actuator can vary energy to be applied to a shape memory alloy, depending on, for example, an ambient temperature. The impact producing actuator has a drive signal generation unit that generates a drive signal based on a single pulse signal generated in response to an input operation and outputs the drive signal, a switching element whose switching operation is controlled by the drive signal, and a shape memory alloy through which electric current passes for a period of time during which the switching element is turned on or off. The impact producing actuator is configured such that the period of time during which the switching element is turned on or off varies depending on the ambient temperature.