Phyllodes tumours of the prostate are very rare tumours, as less than 40 cases have been reported in the literature. The authors report the case of a 28-year-old man managed for a phyllodes tumour of the prostate diagnosed in a context of haemospermia. The diagnosis was established by ultrasound, CT MRI and prostatic biopsies. Radical prostatectomy was performed after multidisciplinary discussion. Thirty six months after the operation, the patient was in complete remission, with spontaneous erections and had fathered a child conceived by medically assisted procreation. The authors stress the importance of nerve-sparing radical surgery and early sexual rehabilitation.