The eurozone inflation rate has fallen to 0.3% in August, near a five-year low, adding to fears of a deflationary spiral, according to Eurostat figures.
That compares with a rate of 0.4% in July.
The drop, driven by lower food and energy prices, will add to pressure on the European Central Bank (ECB) to take action to stimulate the economy.
Separate figures showed the unemployment rate remained near a record high at 11.5% in July.
The ECB meets next Thursday to decide on interest rates.
Most analysts are not expecting any action yet, but speculation is growing that in the coming months it may inject money into the system, a practice called quantitative easing, in the hope of stimulating growth and pushing up prices.
Mario Draghi, head of the ECB, has previously described inflation at below 1% to be in a “danger zone”.