An internal electrode layer (5) is formed by a common electrode layer (3) and a feed electrode layer (6) which are alternately arranged via a piezoelectric layer (1) in the layer direction. The common electrode layer (3) has a common electrode (3a). The feed electrode layer (6) has a first feed electrode layer (6a) and a second feed electrode layer (6b). The main surface of the piezoelectric layer (1) is divided into two parts in the longitudinal direction (L) and the lateral direction (S) to obtain four regions (A1 to A4). The first feed electrode (6) has a pair of first electrodes (2, 2) arranged on two (A2, A4) of the four regions (A1 to A4) opposing in a first diagonal direction (D1) of the main surface of the piezoelectric layer (1) and electrically connected. The second feed electrode (6) has a pair of second electrodes (4, 4) arranged on two (A1, A3) of the four regions (A1 to A4) opposing in a second diagonal direction (D2) of the main surface of the piezoelectric layer (1) and electrically connected. The common electrode (3a), the first electrodes (2, 2), and the second electrodes (4, 4) are connected to respective external electrodes (7g, 7b, 7a).