Cholera is a disease rarely imported in the Netherlands. Recently a 34-year-old woman who had returned from a trip through Thailand was admitted to our hospital with complaints of vomiting, watery stools and moderate dehydration. Vibrio cholerae OI serotype Ogawa biotype El Tor was isolated from the faeces. She recovered after antimicrobial and fluid therapy. Her 29-year-old travelling companion had only mild symptoms of diarrhoea, but the bacterium was isolated from her stool also. Cholera should be considered in travellers with vomiting and diarrhoea coming back from Thailand.