Solid electrolytic capacitor element and solid electrolytic capacitor

A solid electrolytic capacitor element comprising:

• an anode foil that contains aluminum element and includes a porous part at least in a surface layer of the anode foil;
• a dielectric layer that covers at least a portion of a surface of the anode foil;
• and
• a solid electrolyte that covers at least a portion of the dielectric layer,
• wherein the solid electrolyte contains sulfur element, and the solid electrolyte has a first part filled in voids in the porous part in the anode foil having the dielectric layer and a second part that protrudes from a main surface of the anode foil having the dielectric layer,
• the first part contains a first polymer component corresponding to a conjugated polymer and a second polymer component corresponding to a polymer anion containing the sulfur element,
• the first polymer component contains the sulfur element,
• the conjugated polymer contains at least a monomer unit corresponding to 3,4-ethylenedioxythiophene,
• a weight average molecular weight of the polymer anion is 10000 or more, and
• in elemental mapping of a cross section of the porous part using an electron probe microanalyzer, a presence ratio of the sulfur element is 0.5% or more when a presence ratio of the aluminum element is taken as 100%.