Burnley will have a new manager next season after the club decided not to offer a new contract to Stan Ternent, reports BBC Radio Lancashire.
Ternent has been in charge of Burnley for six seasons
Ternent had held talks with chairman Barry Kilby over the weekend.
But Kilby said: "I'm looking to the long-term future. With this in mind, managerial changes are inevitable. There can never be a good time."
Ternent, who succeeded Chris Waddle as boss in June 1998, is the league's seventh longest-serving manager.
His final game in charge will be Sunday's home game against Sunderland - and assistant boss Sam Ellis will also be leaving the club.
Kilby continued: "Stan has done a fantastic job for this club, including a promotion and keeping us in the First Division for five seasons - but difficult decisions have to be made.
"His contract comes to an end at the end of the season - and it's my judgement that it is time for a change, after six years.
"Stan and I have enjoyed a close working relationship, he has always been passionate about Burnley and has been one of the best Burnley managers of all time.
"I would like to thank him for his devotion and dedication to Burnley - he will always be revered at Turf Moor.
"I sincerely wish him well in his future plans."
The Clarets' Division One future was secured on Saturday, despite a 3-0 defeat at Rotherham, as Walsall lost at Crystal Palace - but Ternent was heavily critical of his side.
His managerial career began at Blackpool in 1979, before spells with Hull City and Bury.
However, Kilby added that no successor to Ternent had yet been lined up.
"We've no names as yet, but we have an idea of the type of managers we'd like to bring in," he said.
Ternent's biographer, Sunday Sport editor Tony Livesey, described the move as "the end of an era for Burnley".
"But what a massive era it's been," he told BBC Radio Lancashire.
"You have to remember, when he took over it was like the Tower Circus at our club. It was chaos!
"I was with him until one o'clock this morning, and he'll kill me for saying this, but there were tears in his eyes. He's Burnley through and through."