Although there are many methods for the treatment of developmental dysplasia of the hip, Salter innominate osteotomy is a surgical technique presently used successfully worldwide. However, several complications can be found after Salter innominate osteotomy. Kirschner (K) wire migration into the pelvic cavity is not a common occurrence and is also rarely reported in the literature. Here, we report the case of a patient who was admitted to the emergency department of our hospital with acute abdominal pain because of K wire migration into the pelvis. We recommend bending the proximal end of the K wires or using threaded K wires to prevent this complication.