Michael Meacher will be sadly missed after serving with "dedication, ability and commitment", John Bercow has said.
The Speaker opened proceedings in the Commons with a tribute to the veteran left-wing Labour MP, who died aged 75 on Wednesday after a short illness.
Mr Bercow praised Mr Meacher for representing his constituents in Oldham West and Royton "without fear or favour" in the Commons for 45 years.
He added: "Many colleagues here present will have known Michael well.
"He served his party, his constituency and his country with dedication, ability and commitment - holding high office in government but above all cherishing Parliament, the legislature, the responsibility of members, under whichever administration, to hold the executive to account.
"In recent years he was a very prominent, active and effective contributor to the work of Parliament first.
"I was privileged to come to know him well over the last six years since I took the chair.
"He will, I believe, be sadly missed and at this very unfortunate and miserable time for Lucianne and the family, we extend to them our condolences and express the hope that they can look forward in the future to happier times."
Conservative MP Philip Davies (Shipley) said he shared a member of staff with Mr Meacher, noting this was unusual.
He told Mr Bercow: "He was a very great man and the words that you said are very well said indeed. I send my sympathies to his family too."
Labour's Paul Farrelly added: "Can I share the sentiments about Michael Meacher. He was, 30 years ago, the first Member of Parliament I ever met."
A by-election will be held in Oldham West and Royton, where Mr Meacher enjoyed a comfortable 14,738 majority.
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