Manufacturers saw a further decline in new orders, including from abroad. They cited softer demand and the instability of the country's financial sector, although the fall was the weakest since September.
"Firms struggled with a lack of work during the month, a result of weaker demand for Greek manufactured goods and lowered their workforce for the first time since May," said IHS Markit economist Samuel Agass.
Manufacturers faced a substantial increase in input costs in December, mainly linked to higher prices for steel, zinc and dairy products, forcing them to raise output prices for the first time in 70 months.