President Park Geun-hye's job approval rating edged up after her recent groundbreaking visit to Iran and amid lingering tensions on the Korean Peninsula, a new poll showed Monday.

A poll released by polling agency Realmeter on Monday showed 35.9 percent of people approved of the job Park is doing, up 4.9 percentage points from a week earlier.

Those who disapproved of Park's job performance came to 59.9 percent, down 4.5 percentage points from a week before.

Realmeter said conservatives -- the key supporters of Park -- rallied around her after she secured economic achievements from her trip to Iran.

Park and her Iranian counterpart, Hassan Rouhani, observed the signing of nearly 20 out of 66 memorandums of understanding worth up to $45.6 billion. Seoul hopes the MOUs pave the way for South Korean companies to eventually win massive infrastructure projects under way in Iran.

Tensions persisted on the Korean Peninsula over North Korea's possible provocations amid its rare congress of the ruling Workers' Party.

Park's job approval rating plunged to 31 percent in the fourth week of last month following an election rout by her ruling Saenuri Party in mid-April.

Meanwhile, Moon Jae-in, a former leader of the main opposition Minjoo Party received 27.1 percent, up 1.9 percentage points from a week earlier, according to the poll released by local pollster Realmeter.

Moon's party received a big boost from the parliamentary elections in April, in which it secured 123 out of 300 seats up for grabs. The party has become the single largest party in the upcoming parliament that starts work on May 30.

Moon is trailed by Ahn Cheol-soo, a co-leader of the minor opposition People's Party, with 17.2 percent; former Seoul Mayor Oh Se-hoon in third with 12.1 percent and Kim Moo-sung, former head of the Saenuri Party, with 7.4 percent.

The survey was conducted on 2,028 adults from May 2-6 and had a margin of error of plus or minus 2.2 percentage points, the pollster said. (Yonhap)