The Argentina international's future at the Premier League giants has been called into doubt, with reports that City are interested in signing Monaco’s teenage sensation Kylian Mbappe.
Aguero's agent Hernan Reguera dispelled those rumours on Saturday, saying that the 29-year-old hitman was definitely staying at the Etihad.
"They [City fans] should not have any doubt or fear," Reguera said. "Sergio remains at Manchester City. It is safe."
Paris Saint-Germain and Inter are among the clubs interested in Aguero, who scored 33 goals for City in all competitions last season.
The Serie A giants, though, never made an offer for the prolific striker, Reguera added.
"There has never been an offer," he said. "They never presented the opportunity to get away from City.
"As I said, he is happy and will remain."
Aguero's contract runs out in 2019, but as yet there have been no talks about an extension.
"For the moment, we have not spoken," Reguera said.
"We are so good. He still has two years and he is happy."
Aguero joined City from Atletico Madrid in 2011 and has scored 122 goals in 181 games for the Manchester club.