We describe nine children with antibiotic-associated hemorrhagic colitis without Clostridium difficile toxin. The onset was usually sudden, with severe hematochezia and abdominal cramps. The illness quickly resolved and required no specific treatment except discontinuation of the implicated antibiotic. Early proctosigmoidoscopy was a useful diagnostic adjunct. It appears that antibiotic-associated hemorrhagic colitis is a distinct entity rather than a variant of antibiotic-associated colitis in children.