Inflation across the eurozone fell to 0.7% in October, down from 1.1% in September.
That represents the lowest level in the 17-country currency area for four years.
12 months earlier, in October 2012, the rate of inflation stood at 2.6%.
Ireland's rate of inflation was negative in October, down just 0.1% - one of only four countries with a negative rate, alongside Greece (-1.9%), Bulgaria (-1.1%), and Cyprus (-0.5%).
On average across Europe, costs of electricity, accommodation, and tobacco rose the most.