A nose knife with good usability and little interference with tools such as an endoscope in nasal cavity surgery is provided. A nose knife (10) of the present invention includes a handle (13), a shank (11), and a blade (12). The shank (11) includes a straight part (11a) connected straight to the handle (13) along the same axis, and a curved part (11b) integrally connected to the front end of the straight part (11a)； and the blade (12) is provided at the front end of the curved part (11b), and direction of a blade tip (12b) of the blade (12) is 65 degrees to 75 degrees inclusive to the axis line of the straight part (11a).
