South Korean President Lee Jae-myung's approval rating rose 0.8 percentage points from a week earlier to 69.9 percent last week, a weekly poll showed Monday.

The negative assessment of Lee's conduct of state affairs slipped 1.2 percentage points to 28.2 percent, according to computer-assisted telephone interviewing (CATI) by local pollster Flower Research.

The ruling liberal Democratic Party's support decreased 0.1 percentage point to 56.2 percent, while the conservative opposition People Power Party's approval score was unchanged at 25.4 percent.

Support rate for the minor left-leaning Rebuilding Korea Party and the minor rightist New Reform Party logged 2.3 percent and 1.9 percent each last week.

The pollster's separate survey of the automated response system (ARS) showed that Lee's approval rating advanced 0.5 percentage points to 64.5 percent last week compared to the previous week.

The CATI and the ARS surveyed 1,005 and 1,007 voters each from Friday to Saturday. They had plus and minus 3.1 percentage points in margin of error with a confidence level of 95 percent.