We report about a case of a pregnant women in the 23rd gestation week who sustained an isolated acetabular fracture in a car accident. The fracture was treated surgically by open reduction and internal fixation 6 days after trauma. The outcome for the mother and the baby was excellent; both could be followed up for 1.5 years. The baby did not suffer from any disease related to the diagnostic or surgical procedures. We conclude from this case and from reviewing the literature that the operative fixation of an acetabular fracture during pregnancy is the appropriate treatment with minimal risk for the unborn child and best outcome for the mother.