In a small connector including a plurality of contact portions in an insertion direction of an object to be connected, increasing the effective fitting length with the object and eliminating the risk of bucking of a terminal caused by the object being caught by the terminal. A first contact portion and a second contact portion can be extended in directions opposing each other with a first bent-back portion of a first terminal piece and a third bent-back portion of a second terminal piece, and can be close to each other compared with a known connector in which a first contact portion and a second contact portion extend in opposite directions. An effective fitting length of the first contact portion or the second contact portion with respect to the plug terminal can be increased.