Choriocarcinoma is not uncommon in most of the Asian countries. Because of its early dissemination to remote organs such as lung, the early detection of the disease is very important. There are many clinical tests to diagnose choriocarcinoma but each test has relative drawback and limitations. Recently pelvic angiography is actively explored in detecting this disease and, in addition, in evaluating the effects of chemotherapy. The present communication describes our own experience of the angiographic findings of 4 cases including 2 cases with postchemotherapy follow-ups. In all 4 cases, we found X-ray findings typical to choriocarcinoma. Among others, intratumoral AV shunts and consequent premature venous filling, tumor staining with central avascularity and regional arterial hypertrophy were impressive. Postchemotherapy angiograms revealed rather dramatic regression of the vascular changes with one exception of relative persistence of AV shunts the completion of the third cyc e of chemotherapy. In this case urine hCG turned to be negative already at the termination of the second cycle.