A portable information terminal device cradle apparatus includes a recording/reproducing apparatus for recording and reproducing data using a recording disk, disposed in an inner space enclosed by an enclosure including an upper plate and a lower plate, a main part of a connector for a connection with a portable information terminal device and/or a cradle assembly placed on the upper plate, and a connector holding part for holding the main part of the connector such that the main part of the connector is rotatable with respect to the upper plate.