A coaxial connector includes a plug and a receptacle that are electrically connectable to each other. The plug includes a first contact, a holder, a first tubular shell, and a shield member. The receptacle includes a second contact, a case, and a second tubular shell. The second contact includes a bottom portion, a pair of standing portions, and an extension. The pair of standing portions include respective contact portions having a wide shape and can clamp an end portion of the first contact. The extension includes a tip portion that is to be fixed to a substrate, a hold that is held by the case, and an elastic portion that is elastically deformable. The elastic portion can undergo elastic deformation in a direction orthogonal to a direction in which the contact portions extend.