A 53-year-old man trying to put in an order at a Manhattan McDonald’s was punched to the ground, repeatedly beaten and robbed in a horror caught-on-camera attack, police said.

The victim was hospitalized with a severe head injury after being targeted by the unidentified suspect while using the fast food chain’s self-serve kiosk in Midtown just after 7.30 a.m. on Monday.

Surveillance video from inside the McDonald’s, located on 7th Avenue, shows the brute coming up behind the victim and knocking him to the floor with a single blow to the head.

The man could be seen scrambling to his feet before the suspect pushed him against the counter and demanded his wallet, police said.

The perp was caught on camera throwing the man down again, repeatedly kicking him in the head and then stealing his phone and wallet from his jacket.

At least one other customer was in the restaurant as the attack unfolded, but no one was shown on the surveillance coming to the victim’s aid.

The victim was taken by EMS to Bellevue Hospital in a critical but stable condition, cops said.

The suspect, who is still at large, was caught on surveillance calmly leaving the McDonald’s and fleeing into the nearby Penn Station in the wake of the assault.

He was last seen wearing a black winter hat, a dark blue The North Face jacket with yellow trim, dark blue, gray and white pants and brown boots, police said.