The incident occurred in Nawalapiiya. The father and son had come to a liquor shop at Kadiyanlena in Nawalapriya.
The son has bought a bottle of arrack for him and given a beer bottle to the father.
The irate father has smashed the beer bottle and has come home where they have quralled over the incident.
The father has suffered severe injuries due to the clash and has been admitted to the Nawalapitiya Hospital.
Police have arrested the son.