A stylet can be easily removed from a needle main body even when a needle section is bent, and contributes to an advanced medical treatment such as percutaneous laser disk decompression (PLDD). The stylet includes a rod-like section, and a base end block that is provided at a base end of the rod-like section, the base end block being engaged with a base end block of a needle main body for positioning, the rod-like section being inserted into the needle main body from a base end of the needle main body to close a front end opening of the needle main body, the entirety or part of the rod-like section being a helical coil formed by helically winding a wire. Since the helical coil is flexible, and decreases in diameter when pulled, friction with the inner surface of the needle section decreases, and the stylet can be easily removed from the needle main body even when the needle section of the needle main body is bent.
