The embodiments of the present invention provide a method and an apparatus for transmitting a data frame. The method comprises: acquiring at least one address of a destination address (DA) and a source address (SA), that are corresponding to data transmission direction information; determining, according to the data transmission direction information, an address field for carrying at least one address of the DA and the SA; and sending the data frame comprising the address field to a receiver. The method and apparatus for transmitting a data frame disclosed by the present invention can reduce overhead of an MAC frame header, improve transmission efficiency, and enable a station to acquire DA and/or SA of a data frame.