Introduction: Gartner's duct cysts are remnants of the Wolffian duct system, which regresses in females but can occasionally persist. These cysts are relatively rare, found in about 1% of women with Gartner's duct remnants. A simple technique is described here for the complete excision of a giant Gartner cyst. Case description: A 37-year-old, Para 1, living 1, with a previous lower segment cesarean presented to the gynecological outpatient department of Dr RML Hospital with complaints of mass coming out per vaginum for 1 year. She was diagnosed to have a vaginal cyst, 11 years ago during her treatment for primary infertility for which a simple incision and drainage were done. The cyst recurred 7 years later. She had to manually reposit it. Investigations: Transvaginal ultrasound report showed a large, thick-walled cystic anechoic lesion of 11 × 6 cm lateral lo left ovary. Magnetic resonance imaging (MRI) pelvis showed a well-defined large cyst arising from the anterior wall of the vagina of 5.9 × 2.5 × 11.9 cm. The patient had complete Gartner duct excision under regional anesthesia, using methylene blue for delineation of the cyst wall. Conclusion: This is a simple technique for complete excision of the cyst vaginally. Methylene blue dye is a cheap and easily available alternative to fluorescein dye used in other studies.