Solid electrolytic capacitor element and solid electrolytic capacitor

A solid electrolytic capacitor element included in a solid electrolytic capacitor includes an anode foil including an Al element and including a porous portion at least in a surface layer, a dielectric layer covering at least a portion of a surface of the anode foil, and a solid electrolyte covering at least a portion of the dielectric layer. The solid electrolyte contains element S, and the anode foil having the dielectric layer has a first portion filled in the pores of the porous portion and a second portion protruding from the main surface of the anode foil having the dielectric layer. In an element mapping using an electron beam probe microanalyzer in a cross section of the porous part, the abundance ratio of elemental S is 0.5% or more when the abundance ratio of elemental Al is 100%. 固体电解电容器中所含的固体电解电容器元件包含：包含Al元素且至少在表层包含多孔质部的阳极箔、覆盖所述阳极箔的至少一部分表面的电介质层、以及覆盖至少一部分所述电介质层的固体电解质。所述固体电解质包含S元素，并且在具有所述电介质层的所述阳极箔中具有填充于所述多孔质部的孔隙内的第1部分和从具有所述电介质层的所述阳极箔的主面突出的第2部分。在所述多孔质部的剖面的使用电子射线探针显微分析仪的元素映射中，将Al元素的存在比率设为100％时的S元素的存在