A sum of cash was also taken from his home.
Gardaí are investigating an aggravated burglary in the midlands.
Two people entered a house in Ballykeeran in Westmeath early on Saturday morning and assaulted the owner of the home, who lived alone, and stole a sum of cash.
The homeowner, a man in his 70s, was taken to Midlands Regional Hospital Tullamore for treatment of non-life threatening injuries.
Gardaí are appealing for witnesses to the incident, particularly those with camera or dashcam footage, to come forward.
Anyone with any information is being asked to contact Athlone Garda Station.
An elderly man is "shocked" after being assaulted at his home in the midlands.
Crime Prevention Officer in Westmeath, Sergeant John McWalters says it was an unusual incident: