Jason Kenny, 46, has been getting more than 50 messages a day on Twitter from fans of his namesake who has won three gold medals in Rio.
The father-of-one, who like the Olympian is originally from Farnworth, said it was an "absolute pleasure" to get the cyclist's tweets.
"I reply and say thank you but I am not in Rio", he told the Bolton News.
The Peugeot car sales manager, who lives in Adlington, said it was no trouble for him and "because he's such a nice guy, they are always very nice messages".
Mr Kenny has gone to considerable efforts in his Twitter biography to differentiate himself from the star.
It reads: "Bolton lad but not an Olympian, that's @jasonkenny107 who's amazing + not Canadian that's @jkenney who's...Canadian. Often confused for both you ain't the first."
Cyclist Jason Kenny equalled Sir Chris Hoy's British record of winning six Olympic gold medals on a sensational night in Rio on Tuesday.
Mr Kenny then woke up to a string of tweets praising the 28-year-old Olympian for his success.
He said it has happened for years, starting during the Beijing games, continuing in London and now Rio.
"I usually just re-tweet them or sometimes I reply", he said.
People "usually apologise" when they realise their mistake, he said, "but they don't need to - it's easily done!"
A keen cyclist himself, Mr Kenny remembers getting a "good luck" tweet from the Olympian in 2012 when he messaged him about a bike challenge he was completing early one Sunday morning.
He said the sportsman "is doing fantastically" in his career, adding: "If he does not become Sir Jason Kenny, then there is something wrong."

The businessman headed to Clacton-on-Sea after he admitted he knew "nothing" about the Essex town.
But following his visit, he said he would be backing local party councillor Jeff Bray.
Mr Banks initially planned to take on current MP Douglas Carswell, before he announced he would not be standing.
The multimillionaire businessman said: "I have no intention of standing in the way of hard-working activists who are the soul of the party.
"Therefore, after visiting Clacton, I believe it would be wrong of me to stand against Jeff in the forthcoming hustings."
Mr Banks previously said he only knew Clacton from a "fabulous day out" during the referendum campaign, and as one of the strongest supporting areas for Euro-scepticism.
He said he has agreed to give the local UKIP party financial assistance to fight the election.
His arrival in the constituency follows the announcement by knife crime campaigner Caroline Shearer that she intends to stand as an independent there.
Her son, Jay Whiston, was 17 years old when he was murdered by Edward Redman in Colchester in 2012.

Nicholas Eggington was found guilty of two counts of indecent assault and two counts of gross indecency against a male child between 1992 and 1993.
The 58-year-old, who taught at the Cheam School in Hampshire, was placed on the sex offenders' register for life.
He is also subject to a sexual harm prevention order.
Winchester Crown Court heard Eggington, from Nottingham, worked at the school in Headley between 1987 and 1993.
Following sentencing on Friday, a Hampshire Police spokesman said the victim had shown "courage" during the "difficult investigation".
A car salesman has received a flood of congratulatory tweets after he was mistaken for an Olympic gold medallist.
[NEXT_CONCEPT]
Former UKIP donor Arron Banks has said he will not stand for the Clacton seat in the general election after a fact-finding mission to the town.
[NEXT_CONCEPT]
A teacher has been jailed for three years for sexually abusing a boy at a preparatory school.