The present invention discloses an acoustic surface wave device, wherein the device comprises a front section acoustic surface wave resonance which has IDT electrode; a rear section first and second acoustic surface wave element which connects to said acoustic surface wave resonance in series, and separately have odd number (more than three) of IDT electrodes; a signal derivation wiring, which isconnected to said IDT electrode of front section side and that of rear section side; a derivation wiring for grounding, which connects to said IDT electrode of rear section side and grounding electrode; a capacitance forming section comprising a part of said signal derivation wiring, a part of the derivation wiring for grounding opposite to said a part of said signal derivation wiring, and an insulator clamped by a part of the both wirings; a imbalance input-output terminal connecting to said IDT electrode of front section side; two balance input-output terminal connecting to said IDT electrode of rear section side. Such that the balance degree of the balance type acoustic surface wave filter is improved.