A surface-acoustic-wave component that comprises a first piezoelectric layer composed of zinc oxide (ZnO), a second piezoelectric layer composed of lithium niobate (LiNbO₃), and a protective layer, which are sequentially formed on a silicon substrate, on which electrodes (e.g., interdigital transducers) are further formed. Alternatively, it comprises a conductive layer composed of zinc oxide (ZnO), a piezoelectric layer composed of lithium niobate (LiNbO₃), and a protective layer, which are sequentially formed on a silicon substrate, on which electrodes are further formed. The piezoelectric layer can actualize preferable orientation so as to improve the electromechanical coupling coefficient (K²). Thus, it is possible to produce surface-acoustic-wave components that contribute to manufacturing of highly-integrated electronic circuits such as frequency filters and oscillators as well as electronic devices such as portable telephones.