The Northern Ireland Council for Voluntary Action has said it "totally agrees" with the ban on smoking in workplaces announced by Northern Ireland health minister Shaun Woodward last week.
The ban includes all pubs and restaurants and is due to take effect in Northern Ireland in 2007. It means that England is the only country in the UK so far not to adopt a policy prohibiting smoking in all enclosed public spaces.
"Smokers have the right to smoke, but they should do so without harming others," said Seamus McAleavey, chief executive at NICVA.
A recent NICVA survey found that 85 per cent of people working in charities supported the ban - 94 per cent said it would benefit both staff and volunteers.