We recently encountered two cases of emphysematous pyelonephritis with abscess formation, which have recovered by only conservative treatment and percutaneous abscess drainage(PAD). Two patients had diabetes mellitus. in the first case, initial CT showed left intrarenal abscess with air-fluid level. In the second case, CT showed right perirenal abscess with air-fluid level. PAD was performed under CT and US guidances, respectively. Both patients were successfully treated with PAD and conservative treatment. Follow up after confirmation of abscess resolution by CT scan and contrast study through the catheter, we removed catheters two months and 40 days after PAD respectively.