Schneiderian papilloma is a kind of benign tumor that generally arises in the nasal and paranasal sinus mucosa.Here we present a case of Schneiderian papilloma found in the lacrimal sac.A 38-year-old woman with half-a-year history of right eye keratoleukoma applied to the clinic.Examinations found a central corneal ulcer,and penetrating keratoplasty was scheduled as a means of relieving vision problems in the right eye.However,penetrating keratoplasty was delayed because of a purulent discharge effusing from the right inferior punctum during irrigation of the lacrimal passages.