The present invention provides a rewritable optical disc which is compatible with a DVD-ROM reproduction apparatus and employs the groove recording method. The optical disc has a recording layer having a land 10 and a groove 9 onto/from which an information signal is recorded and reproduced with a light of a predetermined wavelength, wherein if it is assumed that the groove has a bottom width W1 and an opening width W2, then a groove average width X [µm] can be expressed as follows:X = (W1 + W2) /2, and if the groove has a depth Y nm , then X and Y satisfy the following relationships:Y ≥ 4736X2 - 4764X + 1239X ≤ -0.000127Y2 + 0.018624Y - 0.075043X > 0.40.