A method for decoding a low density parity check (LDPC) code for forward error correction by a receiver side in a wireless communication system according to an embodiment of the present invention comprises the steps of: acquiring a first reconstructed packet vector by decoding a reception packet vector encoded by an LDPC code generation matrix; determining a candidate for an error packet to be excluded form the reception packet vector when an error is detected in the first reconstructed packet vector; and acquiring a second reconstructed packet vector from the reception packet vector from which the determined candidate for the error packet has been excluded, wherein the step of acquiring the second reconstructed packet vector includes acquiring the second reconstructed packet vector through Gaussian elimination for the LDPC code generation matrix from which a row matrix corresponding to the candidate for the error packet has been excluded.