SEOUL, Sept. 1 (Xinhua) -- South Korean President Lee Jae-myung's approval rating rose 3.1 percentage points from a week earlier to 67.3 percent last week, a weekly poll showed Monday.

The negative assessment on Lee's conduct of state affairs fell 3.3 percentage points to 31.0 percent, according to computer assisted telephone interviewing (CATI) by local pollster Flower Research.

The ruling liberal Democratic Party's support increased 0.6 percentage points to 50.3 percent, while the conservative opposition People Power Party's approval score declined 2.1 percentage point to 26.5 percent.

Support rate for the minor left-leaning Rebuilding Korea Party and the minor rightist New Reform Party logged 3.9 percent and 3.5 percent each last week.

The pollster's separate survey of automated response system (ARS) showed that Lee's approval rating advanced 2.5 percentage points to 58.9 percent last week compared to the previous week.

Both the CATI and the ARS surveyed 1,008 voters from Friday to Saturday. They had plus and minus 3.1 percentage points in margin of error with a 95-percent confidence level. ■