Arpaio, 80, thanked supporters for their "kind wishes," The (Phoenix) Arizona Republic said Sunday. He made a Youtube video from his hospital bed, explaining what happened.
"I blame myself," Arpaio said. "I fell. I broke my arm. [I'll] tell you one thing. I wouldn't recommend that situation to anybody."
A department spokeswoman said Arpaio had been walking to lunch Thursday when he tripped on a sidewalk and fell, KPHO-TV, Phoenix said.
He is expected back to work in a few days and will be in a sling for about six weeks.