Probe and electric connecting apparatus

An electric connecting apparatus comprising:

• a plurality of probes electrically connecting a first contact target to a second contact target,
• wherein each of the plurality of probes includes
• a barrel portion extending in an up-down direction and formed in a tubular shape;
• a first plunger portion partially inserted into a first end of the barrel portion and electrically contacting the first contact target;
• and
• a second plunger portion partially inserted into a second end of the barrel portion and electrically contacting the second contact target,
• wherein the barrel portion includes
• a first barrel portion having a predetermined inside diameter, and
• a second barrel portion arranged inside the first barrel portion and having a shorter outside diameter than the predetermined inside diameter,
• wherein the first barrel portion includes a first spring portion exerting a spring function in the up-down direction,
• wherein the second barrel portion includes a second spring portion exerting a spring function in the up-down direction, and
• wherein the first plunger portion includes a main body portion having a longer dimension than an inside diameter of the first barrel portion.