An address information detecting apparatus in accordance with the present invention is arranged such that a first interpolation address generating section generates a first interpolation address according to a consistent signal supplied from an address comparison section, and a second interpolation address generating section generates a second interpolation address according to an error detection signal supplied from a CRC error detecting section. When a detected address is consistent with at least either of the first and second interpolation addresses and also no error is discovered according to the error detection signal, the detected address is adopted as absolute location information, whereas in situations other than the above, the first interpolation address is adopted as the absolute location information. On this account, even if an address error is mis-detected, the malfunction of the apparatus is prevented and proper recording/reproduction can be carried out.