3 early Mooren’s ulcers were successfully treated by only one-time conjunctival excision adjacent to the ulcer, while in 2 other chronic vascularized Mooren’s ulcers, repeated conjunctival excision was required for a final remission. The clinical outcome of these 5 eyes was better than that of 7 other eyes treated by conjunctival flap procedure, lamellar kerato-plasty, topical eye drops or systemic medications. Four fragments of excised conjunctival tissue were examined histopathologically; the substantia propria was found to be infiltrated with plasma cells.