According to an aspect of the invention, a functional element includes a substrate which is provided with a concave section; a stationary section connected to a wall section that defines the concave section of the substrate; an elastic section which extends from the stationary section and is capable of stretching and contracting in a first axis direction; a movable body connected to the elastic section; a movable electrode section which extends from the movable body. The concave section includes a cutout section which is provided on the wall section. The stationary section includes an overlap section which is spaced with the substrate, and overlaps the concave section when seen in a plan view. At least a portion of the overlap section overlaps the cutout section when seen in the plan view, and the elastic section extends from the overlap section.