When a posterior malposition of the sacroiliac joint happened, the affected leg looked like shorter than the other. This was a case of 54-years-old male suffered from an injury of the sacroiliac joint two years ago. It was hardly for him to bend down. Even, he couldn't bend his back to wear pants. When he felt helpless, he visited me. He accepted a treatment of vector manipulation correction for three times. He recovers the health finally.