An inexpensive surface acoustic wave device that increases an acoustic velocity of a surface acoustic wave and an electromechanical coupling coefficient includes a piezoelectric substrate in which a LiNbO3 single-crystal plate having Euler angles (0°, 67° to 160°, −5° to +5°) or (90°, 51° to 133°, −5° to +5°) is provided on a high acoustic-velocity substrate in which an acoustic velocity of a transverse wave is in a range of about 5400 m/sec to about 8660 m/sec or lower, and an electrode provided on the piezoelectric substrate and made of metal.