The number of child labourers fell to 168 million last year from 246 million in 2000, said an International Labour Organisation (ILO) report released ahead of a Global Child Labour conference in Brasilia next month.
It hailed particular progress in cutting the number of youngsters doing hazardous work, "likely to harm the health, safety or morals of children," which had fallen to 85 million from 171 million in 2000.
"We are moving in the right direction, but progress is still too slow," said ILO director-general Guy Ryder.
While the numbers have fallen substantially, 11 per cent of the world's children are still working instead of attending school -- half of them doing hazardous work, stressed Constance Thomas, who heads the ILO's International Programme on the Elimination of Child Labour (IPEC).
The organisation has set a 2016 target of ridding the world of hazardous child labour, which includes dangerous work within a wide range of sectors including agriculture, mining and construction.
To further reduce child labour, she stressed that countries needed to forge ahead with more policies promoting education, social protection measures and poverty reduction, as well as creating decent jobs for adults to remove the need of sending children to work.
Most child labourers are found in the Asia-Pacific region, which counts 78 million of them, down from 113.6 million in 2000.
Thomas said Cambodia especially had seen a "fairly dramatic decrease" in child labour, which now affects 12 per cent of its children, compared to 26 per cent in 2000.
