Ruling Saenuri Party Lawmaker Song Kwang-ho stands to be the fourth sitting lawmaker arrested during the 19th National Assembly.
Song is alleged to have taken some 54-thousand U.S. dollars in bribes in 2012 from local railway supplier AVT in exchange for business favors.
At the time, the four-term lawmaker was the chairman of the parliamentary land and maritime committee, which oversees the Korea Rail Network Authority.
By law, Korean lawmakers are immune from arrest during parliamentary sessions.
But the National Assembly will vote on a motion this Wednesday to strip Song of that immunity.
If it passes, it will set the stage for his arrest, with a judge ultimately deciding whether to issue an arrest warrant.
The move comes as part of an anti-corruption campaign led by the prosecution.
The ruling Saneuri Party has been consistent over the past few weeks in saying that the party would not protect Song, and would bring the arrest motion to the plenary floor.
Meanwhile, regarding the hundreds of pending bills related to stimulating the economy, they are not expected to be submitted during the plenary session as the rival parties continue their discord over the special Sewol-ho ferry bill.
Ji Myung-kil, Arirang News.