The index rose to 57.2 in April from 56.2 in March, according to Swedbank and Silf.
An index above 50 indicates growth.
"Swedish industry continues to show robust development despite an uncertain environment," says Jörgen Kennemar, head of index analysis at Swedbank, in a press release.
He adds that supply chain disruptions and rising commodity prices from developments in the Middle East are challenging and are driving up raw material and input prices across the board. But this is not yet reflected in companies' production plans.
The increased cost pressure is driving inflation and putting pressure on the Swedish Central Bank, according to Kennemar.
