The inflation rate in the euro zone unexpectedly fell significantly at the end of the year because energy prices had not risen as sharply.
In December, consumer prices climbed by 9.2 percent within a year, according to an initial estimate from the statistics office Eurostat on Friday.
The inflation rate was 10.1 percent in November and 10.6 percent in October.
Economists had only expected a decline to 9.7 percent.
Inflation has thus weakened for the second month in a row.
Despite falling again, it is still more than four times the European Central Bank's (ECB) medium-term target of 2 percent.
The currency watchdogs consider this level to be appropriate for the economy in the 20-country community.
Energy prices fueled inflation again in December, albeit not quite as sharply.
Energy prices rose by 25.7 percent year-on-year after 34.9 percent in November.
Food, alcohol and tobacco prices rose 13.8 percent from 13.6 percent in November.
Non-energy industrial goods prices rose 6.4 percent in December.
In November, the increase was 6.1 percent.
Services rose 4.4 percent in December after 4.2 percent in November.
ECB boss Christine Lagarde recently signaled that the ECB will continue on its course of raising interest rates in the new year.
In the fight against the high price pressure, the central bank raised key rates by 0.50 percentage points at its interest rate meeting in December.
After two jumbo rate hikes in September and October, it took its foot off the gas by 0.75 percentage points.
Lagarde promised that the rate of increases of half a percentage point would probably be maintained in the coming meetings.
The next ECB interest rate meeting is on February 2nd.
The euro central bank has already raised interest rates four times in a row within just a few months.
The deposit rate that is decisive on the financial markets and that banks receive for parking excess funds with the central bank is currently 2 percent.