The invention provides a power generation element. The base end portion of a flexible plate-like structure (111) having a first attribute is fixed to a base (310), and the tip end portion thereof is connected to an inter-different-attribute connecting body (112). The base end portions of flexible plate-like structures (113, 114) having a second attribute are connected to the inter-different-attribute connecting body (112), and the tip end portions thereof are free ends. Weight bodies (211, 212, 213) are connected to the lower surface of the inter-different-attribute connecting body (112) and the lower surfaces of the tip end portions of the plate-like structures (113, 114) having the second attribute. When vibration energy is applied to the base (310), the weight bodies (211, 212, 213) vibrate and each of the plate-like structures (111, 113, 114) deforms. This deformation energy is taken out by a charge generating element (400) such as a piezoelectric element to generate power. Since the plate-like structure (111) having the first attribute extends in a Y-axis positive direction and the plate-like structures (113, 114) having the second attribute extend in a Y-axis negative direction, a plurality of resonant systems having different resonant frequencies are mixed along the same axis, widening a frequency band in which power can be generated.