A SAW filter device defines a filter including a high acoustic velocity member, a low acoustic velocity film, a piezoelectric film, and an IDT electrode are stacked in this order. A comb capacitive electrode electrically coupled to the filter is provided on the piezoelectric film. Where λc is a wavelength determined by an electrode finger pitch of the comb capacitive electrode, and, among modes of an elastic wave generated by the comb capacitive electrode, VC−(P+SV) is an acoustic velocity of a P+SV wave, VC−SH is an acoustic velocity of a SH wave, and VC−HO is an acoustic velocity of, out of higher-order modes of a SH wave, a higher-order mode at the lowest frequency side, VC−(P+SV) fF−H, or VC−SH/λC fF−H.