A multiterminal-pair solid electrolytic capacitor employing a two-terminal type capacitor element is provided. In the solid electrolytic capacitor 10 in accordance with the present invention, anode terminal patterns 42A (and anode terminals 43A) are connected to an anode part 24 of a capacitor element 12 through anode vias 44A formed in a substrate 14 and an anode pattern 38D formed on a element carrying surface 14a. On the other hand, cathode terminal patterns 42B (and cathode terminals 43B) are connected to a cathode part 28 on the surface of an accumulator 26 of the capacitor element 12 through cathode vias 44B formed in the substrate 14 and cathode patterns 38A to 38C formed on the element carrying surface 14a. Therefore, when the solid electrolytic capacitor 10 is mounted on a packaging substrate from the mounting surface 14b side while a predetermined voltage is applied to four pairs of anode terminals 43A and cathode terminals 43B formed on the mounting surface 14b, the solid electrolytic capacitor 10 functions as a four-terminal-pair solid electrolytic capacitor.