Suspecting his wife of infidelity, a 25-year-old man, Nanjashetty, of Doddmole in Chamarajanagar taluk allegedly beheaded his wife, Gowramma (22), on Friday night. Nanjashetty later surrendered to the Ramasamudra East police.
The crime came to light on Saturday morning. Residents of the village then informed the police.
The couple got married five years ago.
They have a four-year-old boy and a three-year-old girl.
The police said that the couple had frequent fights as Nanjashetty often accused his wife of infidelity.