The 26-year-old former Brighton & Hove Albion defender, who has
enjoyed loan spells with Havant & Waterlooville, Eastleigh,
Eastbourne Borough, Mansfield Town and the Cherries, for four months
before signing in 2012, has been central to Bournemouth's rise in recent
seasons.
He was one of three outfield players to play in every minute of every
league game for the club this season and has in total made 231
appearances for Bournemouth, scoring 15 goals.
Upon signing his new deal, the Hastings-born centre-back told the
club's official website: "It has always been my plan to stay here as
long as possible, so to be given the chance to do that is really
pleasing.
"Myself and AFC Bournemouth have been the perfect match. Since the
manager came in, things have been forever moving upwards and that has
matched my own ambitions.
"These are exciting times to be at the club and hopefully we can
continue to have as much success as we have had in the last few years."
Bournemouth manager Eddie Howe added that Cook was a big part of his plans for next season.
He said: "This new contract is fully deserved after the season Steve has had.
"He has developed into an outstanding defender, has shown great
consistency and has proved himself capable of playing at the very
highest level.
"I am delighted Steve sees his long-term future at AFC Bournemouth because he is a major part of our plans going forward."