Prices in the manufacturing sector decreased 0.4% on the month in May, the data showed.
However, prices in the mining and utility sectors increased 0.4% and 0.2% on the month, respectively, while energy prices inched up 0.1%.
In annual terms, industrial prices rose 8% in May, boosted by higher prices in all sectors.
Manufacturing prices increased 8.9% in May from the year-earlier month, while prices in the utility and mining sectors rose by 8.5% and 4.2% on the year, respectively. Energy prices were up 3.7% in May compared with the same month of 2010.