A method and apparatus for overwriting data in a recording medium, such as a Blu-ray disc write-once (BD-WO), are disclosed. The method includes when receiving a plurality of data record commands for a previously recorded area within the recording medium, replacement recording the received data for each record command on a non-recorded area within the recording medium, and when the plurality of record commands occur in a continuous area within the recording medium, the data is recorded on a management area within the recording medium as a management information for the plurality of record commands.