A surface acoustic wave filter, comprising: at least first to third IDT electrodes (102, 103, 104) arranged in the direction of propagation of surface acoustic waves, each constituted by a pair of opposing upper comb electrodes (102a, 103a, 104a) and lower comb electrodes (102b, 103b, 104b) placed on a piezoelectric substrate, the upper comb electrodes being arranged along a first side of the at least first to third IDT electrodes and the lower comb electrodes being arranged along a second side of the at least first to third IDT electrodes opposite to the first side of the at least first to third IDT electrodes, the first to third IDT electrodes comprising: the first IDT electrode being arranged as center IDT electrode between the second and third IDT electrodes located on its both sides, respectively, the first IDT electrode having its upper comb electrode connected to one of first balanced signal terminals, and its lower comb electrode connected to the other of the first balanced signal terminals; the second IDT electrode having a signal inputted to or outputted from its upper comb electrode on the first side of the second IDT electrode through a first leading electrode; and the third IDT electrode having a signal inputted to or outputted from its lower comb electrode located on the second side of the third IDT electrode through a second leading electrode electrically connected to the first leading electrode, the first leading electrode and the second leading electrode being connected to either an unbalanced signal terminal or one of second balanced signal terminals (110,111). at least first to third IDT electrodes (102, 103, 104) arranged in the direction of propagation of surface acoustic waves, each constituted by a pair of opposing upper comb electrodes (102a, 103a, 104a) and lower comb electrodes (102b, 103b, 104b) placed on a piezoelectric substrate, the upper comb electrodes being arranged along a first side of the at least first to third IDT electrodes and the lower comb electrodes being arranged along a second side of the at least first to third IDT electrodes opposite to the first side of the at least first to third IDT electrodes, the first to third IDT electrodes comprising: the first IDT electrode being arranged as center IDT electrode between the second and third IDT electrodes located on its both sides, respectively, the first IDT electrode having its upper comb electrode connected to one of first balanced signal terminals, and its lower comb electrode connected to the other of the first balanced signal terminals; the second IDT electrode having a signal inputted to or outputted from its upper comb electrode on the first side of the second IDT electrode through a first leading electrode; and the third IDT electrode having a signal inputted to or outputted from its lower comb electrode located on the second side of the third IDT electrode through a second leading electrode electrically connected to the first leading electrode, the first leading electrode and the second leading electrode being connected to either an unbalanced signal terminal or one of second balanced signal terminals (110,111). the first IDT electrode being arranged as center IDT electrode between the second and third IDT electrodes located on its both sides, respectively, the first IDT electrode having its upper comb electrode connected to one of first balanced signal terminals, and its lower comb electrode connected to the other of the first balanced signal terminals; the second IDT electrode having a signal inputted to or outputted from its upper comb electrode on the first side of the second IDT electrode through a first leading electrode; and the third IDT electrode having a signal inputted to or outputted from its lower comb electrode located on the second side of the third IDT electrode through a second leading electrode electrically connected to the first leading electrode, the first leading electrode and the second leading electrode being connected to either an unbalanced signal terminal or one of second balanced signal terminals (110,111).