The invention relates to a structure of a transmission packet for a link adaptation mechanism that can efficiently transmits/receives uncompressed data using a link adaptation mechanism in a high-frequency wireless communication, and an apparatus and method of transmitting/receiving a packet using the same. According to an aspect of the invention, a structure of a transmission packet for a link adaptation mechanism includes a payload having a plurality of data units obtained through error correction encoding of uncompressed data at a predetermined coding rate, an MAC header being added to the payload and having a link adaptation field and a link adaptation extension field expressing presence/absence of the link adaptation field for transmission/reception of the uncompressed data, and a PHY header being added to the MAC header and including information about the coding rate and information about usability of an unequal error protection mode.