A large majority of bishops in the Scottish Episcopal Church have voted to allow same-sex marriage.
The vote removed the condition that marriage is between a man and a women, amending canon law last week.
Clergy are allowed to choose to officiate at gay marriages, meaning that they would not have to act against their conscience.
It required the backing of at least two-thirds of bishops, clergy and laity, with 80% of bishops voting in favour and 68% of clergy.
Members of the Anglican community in Africa and Asia have put pressure on the head of the Anglican Communion, the Archbishop of Canterbury, not to budge on the issue.