Provided is a needle unit for endodontic treatment, including a needle bent at predetermined angle a needle unit body where the needle is rotatably mounted and an inserter for pressing the needle to fix the needle to the needle unit body. The present invention provides an optimal needle for efficiently realizing a needle unit for endodontic treatment. To be specific, the needle unit can be easily used by an operator because a needle bent at a predetermined angle is rotatably mounted on a needle unit body. Also, a diffuser portion is provided at a proximal end of the needle and pressed by an inserter so that the needle is fixed at a constant pressure. Hence, the needle is not fixed too loosely or too tightly to an extent that much force is required to rotate the needle, so that the operator can easily rotate the needle in a desired direction.
