The assault took place during a burglary of his home.
An appeal is being made for witnesses to an aggravated burglary near the Laois - Kildare border.
The incident occurred in the Duneany area of Monasterevin on Saturday.
Two men entered the house and assaulted the owner, who's in his 60s, leaving him requiring hospital treatment.
A number of items were taken with Gardaí believing the men left the scene in a car.
Gardaí are appealing for anyone with any information or who may have seen anything to contact Kildare Garda Station.
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