To provide a recording medium for storing defect management information to record real time data, a defect managing method therefor, and a method for recording real time data.

The recording medium stores information representing use or non-use of linear replacement defect management in which a defective area on the recording medium is replaced with a spare area, in order to record the real time data in a recording area. Thus, while maintaining compatibility between the defect managing method and a defect managing method based on a current DVD-RAM standard, i.e., while allowing a report of the fact that there are blocks which are not linearly replaced, linear replacement is not performed when the real time data is recorded. Thus, the real time data can be recorded and/or reproduced.