A differential pressure detection element includes: a support portion having an opening; a cantilever portion supported in a cantilever manner by the support portion so as to protrude into the opening; a diffusion layer including a piezoresistive portion provided at a fixed end of the cantilever portion; a pair of wiring portions electrically connected to the diffusion layer; a first insulating layer covering the diffusion layer; and a second insulating layer laid on the first insulating layer. A linear expansion coefficient of the first insulating layer is smaller than a linear expansion coefficient of a material of which the cantilever portion is composed, and a linear expansion coefficient of the second insulating layer is larger than the linear expansion coefficient of the first insulating layer.