Markit Economics released its retail purchasing managers' index (PMI) for Eurozone on Friday. Eurozone's construction purchasing managers' index (PMI) declined to 47.9 in April from 49.2 in March.
A reading above 50 indicates expansion in the sector, a reading below 50 indicates contraction.
Sales in France and Italy declined in April, while sales growth in Germany was softer.
"It was a disappointing start to the second quarter for retailers across the big-three Eurozone economies," an economist at Markit, Phil Smith, said.