Disclosed is a solid electrolytic capacitor including a current collector layer which includes a silver paste layer as a component thereof, the silver paste layer comprising first silver particles having a peak particle diameter of 150 nm or less, second silver particles having a peak particle diameter of 500 nm or more, inorganic particles of a material different from silver, and a resinous material. The content of the inorganic particles is 15-50% by volume relative to the total amount of the first silver particles and the second silver particles.