Endometriosis is a common gynecologic disease characterized by growth of endometrial glands and stroma outside the endometrium. Implants are most commonly found in the pelvis but can occur in many other sites. Vulvar involvement of endometriosis is extremely rare. A case of vulvar endometriosis is presented. Endometriosis was infiltrating the subcutaneous scar tissue of left labia minora after cystectomy of Bartholin gland for abscess that has recurred several times despite office-based treatment.