A method of manufacturing a surface acoustic wave device having a high electromechanical coefficient and reflection coefficient, and also having an improved frequency-temperature characteristic is achieved by forming a SiO2 film on an IDT so as to prevent cracking from occurring on a surface of the SiO2 film so that desired properties can be reliably obtained. A first switching device is disposed on the rotation input shaft and switches between a power transmitting state and a non-transmitting state between the first input rotary body and the second input rotary body. Both the photogate and the floating diffusion accumulate charge.