A jig for manufacturing a capacitor element is provided in which the productive efficiency is excellent due to a larger number of anode bodies that can be processed, and an immersion position (height) of the anode body with respect to the processing liquid can be controlled with high accuracy. A jig 10 according to the invention includes a substrate 11, a plurality of beam members 8 arranged on at least one surface of the substrate in parallel to each other, and a plurality of conductive sockets 1 mounted on the beam member 8. The plurality of sockets 1 are capable of electrically connecting to a power source supplying an electric current to a capacitor anode body. The socket 1 is provided with an insertion port 37 for electrically connecting a lead wire of a capacitor anode body, and the insertion port 37 is opened in a downward direction of the substrate 11.