Abstract: An information data recording and reproducing apparatus is disclosed. Editing data showing the parts of the stock data contained in the audio and/or video data obtained as a result of editing is output from an editing device to a control system. The control system generates recording region data for reproduction showing the recording regions occupied by the parts of the stock data in the recording medium of a hard disc array in advance based on the received editing data and recording region data showing the recording regions occupied by the stock data having parts to be contained in the edited audio and/or video data in the recording medium of the hard disc array. The parts of the stock data are reproduced from the hard disc array based on this recording region data for reproduction and audio and/or video data having the same content as that of the edited audio and/or video data is reproduced.