Capacitor

A capacitor comprising:

• a capacitor element including a positive electrode, a negative electrode facing the positive electrode, and a separator interposed between the positive electrode and the negative electrode;
• an electrolyte solution impregnated in the capacitor element;
• a case accommodating the capacitor element and the electrolyte solution and having an opening;
• a terminal plate provided with a first hole and sealing the opening of the case;
• a filter provided so as to close the first hole and composed of a gas permeable sheet capable of preventing permeation of the electrolyte solution;
• a valve body having a cylindrical part and a bottom part, being disposed so that the bottom part covers the first hole, and being formed of an elastic material;
• and
• a cap fixed to the terminal plate, covering the valve body, and holding the valve body in a state in which the valve body is compressed with respect to the terminal plate, the cap having a second hole;
• wherein the valve body and the filter are provided apart from each other.