Piezoelectric element

A piezoelectric element (1) is provided with: a piezoelectric element body (2) having a first main surface (4A) and a second main surface (4B) facing each other, and a peripheral surface (5) connecting the first main surface (4A) and the second main surface (4B), and having a circular shape in plan view; and an electrode (3) provided with at least one of a first main surface (4A) and a second main surface (4B), the thickness of an outer edge portion (3a) of the electrode (3) gradually decreasing toward an edge (3aa) of the outer edge portion (3a). 压电元件(1)具备：压电素体(2)，其具有相互相对的第一主面(4A)和第二主面(4B)、及连结第一主面(4A)和第二主面(4B)的周面(5)，并且在俯视时呈圆形；以及电极(3)，其设置有第一主面(4A)和第二主面(4B)中的至少一个，电极(3)的外缘部(3a)的厚度朝向该外缘部(3a)的边缘(3aa)逐渐变小。