Kris Jenner: Obsessed Fan Arrested for Strolling into House

A Kardashian-obsessed man was busted after waltzing right into Kris Jenner's house in the middle of the day ... TMZ has learned.

Sources tell us the man showed up on Tuesday afternoon and told security at Jenner's Hidden Hills home he had a meeting with Kris. He apparently posed as part of a crew working on Christmas decorations at the house.

We're told the man walked right into Kris' office and addressed her directly -- but she immediately realized the man did not belong there. They immediately called 911 and Sheriff's deputies showed up and arrested the guy.

Much of the family, including Kim Kardashian and Saint West, were home at the time.