IntroductionProstatic stromal sarcoma is an extremely rare malignancy of the prostate with a poor prognosis.Case presentationA 65‐year‐old man presented with dyschezia, and computed tomography showed a large prostate mass. The diagnosis was prostate stromal sarcoma by transrectal needle biopsy. Magnetic resonance imaging suggested rectal infiltration. The patient underwent 4 courses of neoadjuvant chemotherapy with gemcitabine and docetaxel hydrate followed by total pelvic exenteration.ConclusionNo recurrence has occurred at 5 years after the surgery. This is the first report of complete resection in prostate stromal sarcoma after neoadjuvant chemotherapy with gemcitabine and docetaxel hydrate.