Cops say he confronted his 18-year-old son, John, "about being lazy and not doing chores around the house."
But when the argument escalated, the 43-year-old father armed himself with with the weapon and "confronted John with the sword," according to the police statement.
It goes on to say: "John tried to defend himself by using his hands to ward off the sword," and as a result the teen suffered lacerations and needed medical attention.
His injuries were described as serious but not life threatening and when cops arrived to arrest Gutierrez at his Ventura, CA, he went without incident.
He was booked on a charge of assault with a deadly weapon, but police refused to comment on whether John was either willing or able to do his chores when he returned home.