A surface acoustic wave filter element has
- a piezoelectric substrate; and
- a plurality of inter-digital transducer (IDT) electrodes formed on the
piezoelectric substrate,
- wherein at least one of the plurality of IDT electrodes is connected
to a balanced type terminal and other IDT electrodes are connected to balanced
type terminals or unbalanced type terminals, and
- first wiring electrode means which is connected or to be connected to
the at least one IDT electrode and second wiring electrode means which is connected
or to be connected to the other IDT electrodes are disposed on planes different
from each other.
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