An information recording and reproducing apparatus includes a rewritable optical disc having a plurality of sectors on which data can be rewritten. The rewritable optical disc is divided into an additionally recordable region in which the data are additionally recorded and a rewritable disc control region in which an address of a latest recorded sector in the additionally recordable region is recorded. The optical disc is used as an additionally recordable optical disc in which recording is permitted only one time and reproduction can be performed plural times. The information recording and reproducing apparatus further includes a control circuit for recording data on unrecorded sectors in the additionally recordable region and for reading the data from recorded sectors. This control circuit can rewrite and reproduce data in the disc control region. The control circuit reads the disc control region prior to additional recording of data, thereby finding a first unrecorded sector from the address of the latest recorded sector recorded in the disc control region. Furthermore, the control circuit records data on unrecorded sectors following the first unrecorded sector, and upon termination of data recording, the address of the latest recorded sector in the disc control region is rewritten.