To provide a method of manufacturing a solid-state electrolytic capacitor having no deterioration in electric characteristics such as a decline in electrostatic capacitance and an increase in dielectric loss and leakage current, by preventing the creeping up or attachment of manganese contained in a semiconductor mother liquor or a graphite solution onto an anode lead wire.

Valve action metal powder is press-molded and then is sintered to fabricate a capacitor element. Thereafter, the anode lead wire coated with a water-repellent insulation resin is cut into a length of 10 mm, and the cutting face is welded to the element, and thereby the creeping up of manganese onto the anode lead wire and the penetration of an insulating material into the inside of the capacitor element can be surely prevented, resulting in fabrication of the capacitor element with no deterioration in electric characteristics. Furthermore, since the size of a space between a portion where the insulating material is formed and the entire capacitor element can be minimized, the volumetric efficiency of the capacitor element is increased and thereby a solid-state electrolytic capacitor can be provided with a large capacitance.