Solid electrolytic capacitor

A solid electrolytic capacitor comprising:

• at least one capacitor element that includes an anode part and a cathode part;
• an anode lead terminal electrically connected to the anode part;
• and
• a cathode lead terminal electrically connected to the cathode part;
• and
• an exterior body that covers the at least one capacitor element,
• wherein:
• each of the anode lead terminal and the cathode lead terminal includes an embedded part and an exposed part, the embedded part being embedded in the exterior body, the exposed part being connected to the embedded part and being exposed from the exterior body,
• the embedded part of the anode lead terminal includes a first contact surface in contact with the exterior body,
• the embedded part of the cathode lead terminal includes a second contact surface in contact with the exterior body, and
• at least one contact surface selected from the group consisting of the first contact surface and the second contact surface includes a rough surface having a developed area ratio of an interface of more than or equal to 0.4.