To provide a solid electrolytic capacitor capable of being miniaturized with larger capacitance. A solid electrolytic capacitor comprises a capacitor element, an anode lead frame, a cathode lead frame, an adhesive layer and an exterior resin. The anode lead frame is connected to an anode of the capacitor element. The cathode lead frame includes a first and a second cathode leads and a boundary part. The first cathode lead is connected to a cathode of the capacitor element by the adhesive layer. The boundary part is disposed between the first cathode lead and the second cathode lead so as to provide a level difference at the capacitor element side. The exterior resin covers the capacitor element, a part of the anode lead frame, a part of the cathode lead frame and the adhesive layer.