Energy production fell 1.6% on the month in May, while manufacturing output was down 0.5%.
However, mining output increased 2.3% from a month earlier, data adjusted for the number of working days and seasonal factors showed.
In annual terms, the country’s adjusted industrial output edged down 0.2% in April, due to a 2.8% decline in mining output.
Energy production rose 4.7% on the year, but production in the manufacturing industry was flat on the year.
In unadjusted data, Romanian industrial production rose 11.5% on the month in May, and was up 2.7% compared with the same month of 2011.