A first resin encapsulated body and a second resin encapsulated body are stacked to form a resin-encapsulated semiconductor device. The first resin encapsulated body includes: a first semiconductor element; an external terminal; inner wiring; and a first resin for covering those components, at least a rear surface of the external terminal, a rear surface of the semiconductor element, and a surface of the inner wiring are exposed from the first resin. The second resin encapsulated body includes: a second semiconductor element having an electrode pad formed on a surface thereof; a second resin for covering the second semiconductor element; and a metal body connected to the electrode pad, and is partly exposed from the second resin. The inner wiring and the metal body are electrically connected to each other.