Saudi Crown Prince will visit S.Korea this week. Energy will be the main agenda in Bin Salman travel to Seoul.
The two-day visit from Wednesday will be the first by an heir to the throne of the world's largest oil exporter since 1998.
The crown prince, Saudi Arabia's de facto ruler and defence minister, will meet South Korean President Moon Jae-in on Wednesday, Moon's office said.
"The two sides will sign a series of agreements to promote cooperation on areas including energy and public service," a South Korean official told Reuters.
Saudi Arabia is South Korea's top oil supplier. South Korea imported 101.5 million barrels of crude oil from the Middle Eastern country in the first four months of 2019, down 2.7% from a year ago, according to data from state-run Korea National Oil Corp (KNOC).
South Korea has also been keen on Saudi Arabia's nuclear power project.