It said that trading was hit by snow and cold weather in March and April. Total sales in the UK and Ireland were down 2.1% to £1.04bn, with retail profit growth of 12% to £67m.
Ian Cheshire, group chief executive at Kingfisher, said: "We have continued to deliver solid profit growth in a tough first quarter, during which our customers were impacted by adverse weather conditions across Europe and ongoing economic uncertainty.
"While this is a good start to the year, our first quarter is typically one of the least significant contributors to annual profit, and so there is much still to do this year. The headwinds we anticipated at the start of the year look set to continue, but we are in good shape and well prepared."
Meanwhile, B&Q has introduced an England World Cup garden gnome at £12.98.