This speculum is designed to simplify, shorten and to facilitate generally submucous septal resection operations. A complete set consists of three pairs of blades of different sizes and one holder. One pair of blades is selected to suit the conditions of each individual case and fasten into the holder. After incision and separation of the mucous membrane and perichondrium on each side of a deflected septum the speculum is inserted into the nasal chamber on the side of the incision, thence pushed forward into the incision, one blade of the speculum passing on one side of the cartilage and the other blade on the other side, thus "clothes-pinning" the cartilage and bone. By this procedure the blades act as guards on both sides and absolutely prevent button-holing the mucous membrane and perichondrium. The spring setscrew above the blades is then released in order to hold the mucous membrane apart; when