Apparatus and method for compressing header information in packet data network

An apparatus and a method for compressing header information in a packet data communication network are provided to prevent identical header information from be repeatedly transmitted by writing a plurality of profile indexes in the profile field of a header information packet which is transmitted initially when a header is compressed. A header compressor confirms whether common static information exists between the header data of different profiles(201). In case that the common static information exists, the header compressor configures a profile field containing a plurality of profile indexes(203). Then the header compressor creates an IR(Initial and Refresh) packet including the configured profile field and the common static information(205). The header compressor transmits the created IR packet to the other side(207).