The present invention provides a panel seal structure having a seal mounted around the outer circumferential edge of a panel body, such as glass panel, covering an opening formed in a vehicle body. The first surface acoustic wave resonator and the second surface acoustic wave resonator are apodized and connected in parallel. A second clutch is disposed switchably between a second transmitting state of transmitting power and a second blocking state of blocking power transmission. In the invention, the width of each of bank-shaped portions of each of the principal surfaces that are disposed side by side on opposite sides of the groove along the width direction of the vibration arm perpendicular to the longitudinal direction thereof is set at 6 \u03bcm or smaller.