A tracheal tube connector (1) has a circuit side portion (2) for connection to an anaesthetic circuit and an insertable portion (4) for insertion into an endotracheal tube (8). A finger grip portion (3) permits the connector (1) to be pushed into position within the tube (8), whilst a coarse helical thread (7) on the surface of the insertable portion (4) prevents removal of the connector (1) from the tube other than by rotation in a screw-like motion. The connector (1) further includes sealing means (6) to provide an air-tight seal between the tube (8) and connector (1).
