Disclosed is an electrolytic capacitor including: a capacitor element including a pair of electrodes; an electrolyte interposed between the pair of electrodes; a pair of leads electrically connected to the pair of electrodes, respectively; a case in which the capacitor element and the electrolyte are accommodated, and that has an opening; a sealing member that seals the opening, and has a pair of insertion holes for leading out the leads; an insulating plate having a pair of through holes for leading out the leads; and a resin member filled between the sealing member and the insulating plate, wherein the insulating plate has a resin bonding surface that abuts against the resin member, and a mounting surface opposed to the resin bonding surface, and includes at least one protrusion or recess on the resin bonding surface.