Electrolytic capacitor

An electrolytic capacitor comprising:

• a capacitor element including an anode body having a dielectric layer and a solid electrolyte layer in contact with the dielectric layer of the anode body;
• a case that houses the capacitor element;
• an electrolyte solution that is contained in the case;
• and
• a sealing member that seals an opening of the case, wherein:
• the solid electrolyte layer includes a π-conjugated conductive polymer,
• the electrolyte solution contains a solvent and a solute,
• the solvent contains a glycol compound other than a polyalkylene glycol having a weight average molecular weight of 300 or more, a sulfone compound, and a lactone compound,
• a proportion of the glycol compound contained in the solvent is 10% by mass or more,
• a proportion of the sulfone compound contained in the solvent is greater than 30% by mass,
• a total proportion of the glycol compound and the sulfone compound contained in the solvent is 70% by mass or more,
• a proportion of the lactone compound contained in the solvent is more than 0% by mass and less than or equal to 30% by mass, and
• the sealing member includes a butyl rubber.