Abstract: A socket connector configured such that elongated guide holes are formed in the housing so as to receive guide members of a device to be connected, and a slide member is attached to the housing to be slidable in the longitudinal direction of the elongated guide holes so as to restrict the guide members to their initial positions. The socket enables direct placement of the device on the housing, can shorten the projection length of projection terminals of the device, can facilitate positioning of the device to thereby enhance the easiness of attachment operation, can prevent bending of the projection terminals, can cope with an increase in density of the projection terminals, and has a simple structure.