A man was fatally stabbed in the neck in broad daylight on a Bronx street — and cops say his nephew was the killer.

Cops found Eric Shaw’s lifeless body — with the mortal wound — at East 196th Street and Briggs Avenue in Fordham Manor around 12:10 p.m. Friday, only blocks from his home, cops said.

He was rushed to St. Barnabas Hospital, where he was pronounced dead.

About 12 hours later, his nephew, Travis Mason, 18, was busted in connection to the stabbing, cops said.

He was charged with murder and manslaughter on Saturday.

The motive in the slaying was unclear.