A socket includes a first housing and a second housing each including a housing recessed portion capable of housing and holding a contact provided at its first end with a first contact portion and at its second end with a second contact portion while the first and second contact portions each are exposed, and a positioning member which positions the first and second housings independently of each other such that the housing recessed portion of the first housing and the housing recessed portion of the second of housing are disposed adjacent to each other to be paired.