Tulare County sheriff's officials say the stabbing occurred at a home on Aceves and Olympic just before 5:30 p.m.
Deputies say the 41-year-old man was stabbed multiple times in the head, chest and back. He was rushed to a hospital in critical condition.
His name has not been released.
Bystanders detained the man's 27-year-old neighbor until investigators arrived. The suspect has not been identified.
A motive for the attack has not been released.