A cannula casting mould and casting method for improving quality by making it possible to cast a smooth surface. An opening is formed in the side of the front side and a casting mould for casting a cylindrical cannula formed with a liquid flow path that is connected inside to the opening that comprises a mould body in which a casting groove is formed, a core area placed in the casting groove forming a casting open area between the surfaces of the casting groove, and an angle pin prepared in the mould body in an elongated state of the area corresponding to the open area of the casting groove. Furthermore, the injection opening for injecting casting material into the casting opening is prepared on the opposite side of the core area centre of axis from the area where the angle pin was placed in the mould body.