Piezoelectric filter

The invention provides a piezoelectric filter which can save the size of the piezoelectric filter. A piezoelectric filter according to one embodiment of the present disclosure includes: a first substrate having a first main surface; a second substrate having a second main surface facing the first main surface; and an N-order trapezoidal circuit including N (N is an integer of 3 or more) piezoelectric resonators, the piezoelectric resonators included in the trapezoidal circuit from 1 order to M (M is an integer of 1 or more and N-1 or less) order are formed on the first main surface, and the piezoelectric resonators included in the trapezoidal circuit from M + 1 order to N order are formed on the second main surface. 本发明提供一种压电滤波器，其能够节省压电滤波器的尺寸。本公开的一个方式的压电滤波器具有：第一基板，其具有第一主面；第二基板，其具有与所述第一主面相对的第二主面；以及阶数N的梯形电路，其包含N(N为3以上的整数)个压电谐振器，在所述第一主面形成有所述梯形电路所包含的从1阶到M(M为1以上且N-1以下的整数)阶的所述压电谐振器，在所述第二主面形成有所述梯形电路所包含的从M+1阶到N阶的所述压电谐振器。