The male officer was punched in the head, knocking him unconscious. The female officer was also punched, dragged to the floor and then stamped on after attending an incident in Middleton around two thirty this morning.
The two officers saw a large group of men fighting near a pub on Long Street while on the way to another call.
Both officers were taken to hospital but have since been discharged.
The offenders fled the scene after the assault.
One of the offenders is described as being white, of medium build with short brown hair and a beard. He was wearing a dark coloured T shirt, trousers and trainers at the time.
Another is described as being white, of medium build, around 6ft tall and in his early 30s. He had short dark hair and stubble. He was wearing a black belted coat, blue or grey jeans with ripped knees and dark coloured shoes at the time.
No arrests have been made.
Detective Sergeant Tim O’Callaghan, of GMP’s Rochdale division, said: “This is a disgusting way to treat police officers, who spend their days and nights trying to keep the people of Greater Manchester safe.
“We are providing welfare support to the two officers who were attacked after bravely trying to intervene in a large fight and keep the peace.
“We will not tolerate this kind of behaviour and are 100% committed to bringing those responsible to justice.
“Although this happened in the early hours, it was outside a pub at what can be a busy junction so we’re appealing for anyone with information which will assist us with our investigation to contact us immediately”.
