Electronic Device

An electronic device includes a substrate having a first surface and a second surface in a front-back relation, a first electronic component mounted on the second surface, and a lead joined to the second surface of the substrate via a conductive joint member, wherein the lead includes a base end portion extending in a direction along the substrate and joined to the second surface via the joint member, a distal end portion located distally from the substrate with respect to the base end portion in a thickness direction of the substrate and having a terminal surface, and a coupling portion coupling the base end portion and the distal end portion, and θ, wherein, as seen from a direction orthogonal to a plane along which the lead extends, an angle formed by a line connecting an outermost position in which the joint member contacts the base end portion and an outer edge of the substrate and the base end portion is θ, a distance between the first electronic component and the terminal surface in the thickness direction of the substrate is d, a distance between a boundary part between the base end portion and the coupling portion and the joint member in the direction along the substrate is d, and arctan(d/d)=θ