A “highly intoxicated” man pummeled a Brooklyn EMT as the paramedic treated him inside an ambulance, cops said Saturday.

The 55-year-old EMT was tending to the man in the back of the ambulance at the corner of East 15th Street and Kings Highway in Midwood around 12:15 p.m. Aug. 7 when the suspect suddenly started punching him in the chest.

He then bolted from the ambulance, cops said. It wasn’t clear whether the emergency vehicle was moving at the time.

The paramedic was taken to Maimonides Medical Center in stable condition, police said.

The unhinged assailant remained at large on Saturday.