New Zealander Gatland will take charge of Wales' next two World Cup campaigns after committing his future to the Welsh Rugby Union for the next six years.
This new deal will take Gatland's Wales tenure to 12 years, extending what is already a record stint in the role in Wales' history.
Gatland guided Wales to the Grand Slam in 2008 after his appointment in 2007, a feat he repeated in 2012, just a year after leading Wales to the World Cup semi-finals.
Gatland's existing contract had been due to expire after the 2015 World Cup.
Gatland said: "I am proud and delighted to have been chosen by the Welsh Rugby Union to take charge of Wales teams for the next two Rugby World Cup tournaments.
"I have chosen to stay in Wales because of my confidence in the players we have, the coaching structures we have developed and the succession plan of talent we now constantly update."
- Sports & Recreation