The country already has 50,000 doses of the Sinopharm vaccine but had been waiting on the WHO's emergency approval, which was given last week.
Prime Minister Manasseh Sogavare said he was “extremely happy” with the WHO's decision.
“With this approval the National Drugs, Medicines and Therapeutics Committee will now consider the approval of the Sinopharm vaccine,” he said.
Sogavare said he would announce details of the vaccine rollout next week.