Ectopic breast is found to occur most commonly in the axilla, but also less commonly on the vulva and on sites outside the "milk line" like the face, neck and chest. Vulvar adenofibroma developing on ectopic breast tissue in the vulva is exceptionally rare. More precisely, vulvar adenofibroma associated with adenoma with lactating changes has only been documented three times to our knowledge. We herein report a vulvar mass specimen consistent with vulvar lactating adenoma associated with vulvar fibroadenoma occurring in a 36-year-old woman in the postpartum period.