Parliament in Belgium has passed a bill allowing euthanasia for terminally ill children without any age limit, by 86 votes to 44, with 12 abstentions.
When, as expected, the bill is signed by the king, Belgium will become the first country in the world to remove any age limit on the practice.
It may be requested by terminally ill children who are in great pain and also have parental consent.
Opponents argue children cannot make such a difficult decision.
It is twelve years since Belgium legalised euthanasia for adults.
In the Netherlands, Belgium's northern neighbour, euthanasia is legal for children over the age of 12, if there is parental consent.