South Korea's composite consumer sentiment index rose to 106.1 in May from 99.2 in April, according to data released by the Bank of Korea on Friday.
A reading above 100 indicates an improved outlook, while a reading below 100 suggests pessimism.
Sentiment toward current living standards rose two points to 93, while sentiment on the future outlook gained five points to 97.
The outlook for future household income was up two points to 100, while the sentiment for future household spending also rose by two points to 110.
Optimism regarding current local economic conditions increased by 15 points to 83, and the reading for future domestic economic conditions was 14 points higher at 93.