An optical recording/reproducing apparatus and a data recording method thereof. The optical recording and/or reproducing apparatus includes: an encoder which encodes a data for recording in a specified format; an optical pickup which records the encoded data onto a data record area of an optical recording medium which is loaded in the optical recording/reproducing apparatus; and a controller which allocates a specified area of the optical recording medium as a management information record area, controls the optical pickup to record the management information regarding the data being recorded in the data record area to be recorded in the management information record area, and controls the optical pickup to periodically record the management information of the management information record area onto a file information record area of the optical recording medium.