Electrical connecting apparatus

An electrical connecting apparatus characterized in comprising:

• a first electrode region in which a liquid metal is filled in a first recess of a first recessed part that is capable of conducting with a substrate electrode of a first wiring substrate;
• a second electrode region in which a liquid metal is filled in a second recess of a second recessed part that is capable of conducting with a substrate electrode of a second wiring substrate opposing the first wiring substrate;
• and
• a connector that causes conduction between the first electrode region and the second electrode region by bringing one end part into contact with the liquid metal of the first electrode region and bringing the other end part into contact with the liquid metal of the second electrode region,
• wherein the liquid metal in each of the first electrode region and the second electrode region is held in each of the first recess and the second recess by a surface tension of an oxide film on a surface of the liquid metal,
• wherein both end parts of the connector that contact the liquid metal are floating,
• wherein both end parts or one of the end parts of the connector have a tapered shape whose diameter is larger towards a tip side to expand a contact area between the connector and the liquid metal and enable the connector to retain a stable posture due to said surface tension, and
• wherein the first electrode region is positioned directly above the second electrode region.