A relay connector for electrically connecting a board and a coaxial connector including a shell GND, a dielectric member and a core conductor, includes: a conductive first block including a first surface from which the core conductor is projected and a second surface to which the shell GND is fixed, and provided with a guide pin extending in a first direction parallel to the first surface; a conductive second block including a board rest part on which the board is to be mounted and a guide hole into which the guide pin is inserted, and being electrically connected to the first block; an operating member, provided on the first block at an opposite side to the second block; an elastic member provided between the operating member and the first block in a contracted state; and a coupling member, one end of which is fitted into and fixed to a first groove of the second block, the other end of which is fitted into and fixed to a second groove of the operating member.