Batley and Spen MP Mike Wood will not fight the next general election but will stand down in 2015.
Mr Wood, who was elected as the constituency’s first Labour MP in 1997, announced his intention to retire at a meeting of Batley and Spen Constituency Labour Party on Thursday evening.
By the time of the next election Mr Wood will have served as Member of Parliament for 18 years.
Mr Wood said: “It was a difficult decision but I think it is the right one and it will allow the Labour party to find a new, younger candidate to carry on the work here.
“I want to be absolutely clear that I am standing down not winding down. My staff and I will continue to work and fight for local people as we have always done right up to the day of the next general election.”
The local Labour party will now begin the process of selecting a new candidate to fight the next election.
Ken Lowe, outgoing chair of Batley and Spen CLP, said: “Mike is a fantastic MP who is devoted to serving this constituency and who has always prioritised doing just that. He has enjoyed the unfaltering support of the local party since he was selected in 1995. He has set a very high standard and we must now select someone who will serve Batley and Spen just as well – but he will be a hard act to follow.”