The injured garda was manning a checkpoint when the car, driven by a woman believed to be a well-known petty criminal, blasted through shortly before 11am.
Woman who mowed down garda at city centre checkpoint is believed to be 'well-known petty criminal'
A brave garda is recovering in hospital after he was mowed down by a crazed motorist on a city street - writes dublinlive.ie
Garda Tom Gallagher, a Road Policing Garda in Dublin city centre, was on duty on Baggot Street when a female motorist knocked him down.
The injured garda was manning a checkpoint when the car, driven it is believed by a well known petty criminal, blasted through shortly before 11am this morning.
A source said: "Garda Gallagher was performing a normal road policing checkpoint and signalled to the car to stop.
"The female driver accelerated at him and knocked him down - there was no tax, insurance or NCT on the car and the driver didn't have a licence.
"He suffered an injury to his knee - possibly a broken knee cap and, of course, - he is expected to make a full recovery."
The grey Volvo XC90 then sped onto Haddington Road with one of the front tyres blown out.
Travelling at a high speed it crashed on Waterloo Road having collided with a Dublin City Council rubbish lorry.
The female driver and her male passenger emerged from the car, and after an unsuccessful attempt to retrieve items from the back seat, ran off.
Dozens of gardai rushed to the scene and were joined by the garda helicopter as they searched for the pair.
Gardai detained two suspects in Irishtown Garda Station where they were questioned in relation to the incident.
The garda was rushed to St Vincent's Hospital, where he received treatment for his injuries.
It is not the first time the woman suspect has been in trouble with gardai.
It is understood she was previously prosecuted for threatening gardai with blood filled syringes in a incident in 2013.
She has a number of convictions for theft, public order and drug offences.
A Garda spokesman said that Irishtown Garda Station was investigating the incident.
He said: "A male Garda member is being treated in hospital following a collision with a vehicle on Baggot St. shortly before 11am.
"The Jeep/SUV failed to stop and crashed on Waterloo Road.
"Two occupants of the vehicle, a man and a woman, were seen running from the scene."
Read more news of Dublin on our site.