Primary carcinoma of the fallopian tube is rare and its preoperative diagnosis difficult due to the lack of specific symptoms. In this report we present a rare case of primary carcinoma of the fallopian tube with synchronous cervical high-grade squamous intraepithelial lesion (HSIL). A 39-year-old women was admitted to our hospital for routine gynecological examination and underwent surgery because of the finding of HSIL on a routine papanicolaou smear. The histological diagnosis on cervical biopsy and conization material were of cervical intraepithelial neoplasia III (CIN III). Serous carcinoma of the fallopian tube was incidentally found during a planned hysterectomy operation. Postoperatively the patient received six cycles of adjuvant chemotherapy (carboplatin and paclitaxel) and is still under routine control. In conclusion, the genital tract should be examined in detail in case of any existence of a primary genital tumor and CA125 should be added to the examination.