An apparatus for transmitting a broadcast signal is introduced. The apparatus for transmitting a broadcast signal according to the present invention includes: an input formatting module configured to de-multiplex an input stream into at least one Data Pipe (DP); a BICM module configured to perform error correction processing on data of the at least one DP; a frame building module configured to generate a signal frame including the data of the DP; an OFDM generation module configured to generate a transmission broadcast signal by inserting a preamble into the signal frame and performing OFDM modulation; and a signaling generation module configured to generate Physical Layer Signaling (PLS) information.