for example the first substrate 102 may have a single layered read only storage area or the second substrate may have no writable storage area fig8 illustrates a fifth embodiment of the optical recording medium according to the present invention wherein a hybrid disc 110 is shown the structure of the hybrid disc 110 is the same as that shown in fig4 except that the writable storage area 120 is formed with a dual layered structure the writable storage area 120 of the first and second recording layers 46 and 48 and is arranged at the outer part of each of the first and second substrates 52 and 114 as shown in fig8 writing and reading operations are performed through the incident side of the first substrate 52 for this case recording reproducing characteristics in the dual layered structure are different from those of the writable storage area having a single layered structure so that the structure of a recording reproducing apparatus for the optical recording medium may be complicated meanwhile such a dual layered structure is advantageous due to an increased data writing capacity in the writable area fig9 illustrates a sixth embodiment of the optical recording medium according to the present invention showing a hybrid disc 130 in which a read only storage area 134 is formed over a first substrate.