Solid electrolytic capacitor

A solid electrolytic capacitor (1) is provided with a resin molded body (9), a first external electrode (11), and a second external electrode (13). A resin molded body (9) is provided with: a laminate (30) in which a plurality of capacitor elements (20) are laminated; and a sealing resin (8) that seals the periphery of the laminate (30). The first external electrode (11) is electrically connected to the valve action metal base (3a) exposed from the first end surface (9a). The second external electrode (13) is electrically connected to the cathode lead-out layer (7c) exposed from the second end surface (9b). When the thickness of the inside of the cathode lead-out layer (7c) that is not exposed from the second end surface (9b) is t1, the thickness of the exposed portion of the cathode lead-out layer (7c) that is exposed from the second end surface (9b) is t2, the thickness of the inside of the valve action metal base (3a) that is not exposed from the first end surface (9a) is t3, and the thickness of the expos