The England and Manchester United striker has also written a
letter of apology over the incident.
Rooney, 22, is said to have spat on Lee Simmons' back as he left
a restaurant in London with his wife Coleen earlier this year.
Police had threatened to arrest him and send him to magistrates
court unless he apologise.
He spent an hour and a half at Holborn police station on
Thursday night, accompanied by his lawyers, before leaving in a
chauffeur-drive silver Mercedes. He was cautioned for common
assault.
A simple caution is not a criminal conviction, but it will be
recorded on the police database.
He was first questioned the day after the incident in July but
was not arrested.
He claimed to have spat on the ground outside the Hakassan
Chinese restaurant but saliva on Mr Simmons' clothing however
matched Rooney's DNA.
The Sun also reported he first turned up at the police station
on Thursday morning only to be turned away because he did not bring
his letter of apology.
A police spokesman said: "A 22-year-old man attended a central
London police station by prior arrangement. He received a caution
for common assault."
Rooney has been in great form for club and country this year,
although recently caused controversy when he kissed his Manchester
United badge on the field against his boyhood club Everton.