A solid electrolytic capacitor includes a capacitor element having an anode portion, a dielectric film and a cathode portion, an anode lead frame, a cathode lead frame, and a molded resin for covering at least a part of the anode and cathode lead frames and the capacitor element. In a cathode lead frame opposed portion opposed to the capacitor element with a conductive adhesive material being interposed is provided with a through hole having a narrowed portion smaller in diameter than other portions between a capacitor-element-side opening portion and a molded-resin-side opening portion, and the conductive adhesive material is formed in the through hole.