A medical suture needle made of stainless steel, comprising: a cutting blade component; and a body part continuing to the cutting blade component; wherein the cutting blade component having a sharp point and formed with a shape whose degree of thickness decreases from the body part to the sharp point comprises: a first cutting blade part continuing from the sharp point; wherein the first cutting blade part comprises: two first slanted surfaces formed sandwiching an apex, and a first bottom surface sandwiched by the two first slanted surfaces; wherein cutting blades are formed at an edge constituting the apex and at edges where the first bottom surface and the two first slanted surfaces intersect; characterised in that the cutting blade component comprises a second cutting blade part continuing from the first cutting blade part; and in that the second cutting blade part comprises: the two first slanted surfaces formed sandwiching the apex; two second slanted surfaces having rims, which are approximately parallel to the apex, formed on the two respective first slanted surfaces, and on the apex side of the two second slanted surfaces, wherein an angle made by sandwiching the apex by the two second slanted surfaces is smaller than the angle made by sandwiching the apex by the first slanted surfaces; and a second bottom surface sandwiched by the two second slanted surfaces; wherein cutting blades are formed at an edge constituting the apex and at edges where the second bottom surface and the two second slanted surfaces intersect. a cutting blade component; and a body part continuing to the cutting blade component; wherein the cutting blade component having a sharp point and formed with a shape whose degree of thickness decreases from the body part to the sharp point comprises: a first cutting blade part continuing from the sharp point; wherein the first cutting blade part comprises: two first slanted surfaces formed sandwiching an apex, and a first bottom surface sandwiched by the two first slanted surfaces; wherein cutting blades are formed at an edge constituting the apex and at edges where the first bottom surface and the two first slanted surfaces intersect; characterised in that the cutting blade component comprises a second cutting blade part continuing from the first cutting blade part; and in that the second cutting blade part comprises: the two first slanted surfaces formed sandwiching the apex; two second slanted surfaces having rims, which are approximately parallel to the apex, formed on the two respective first slanted surfaces, and on the apex side of the two second slanted surfaces, wherein an angle made by sandwiching the apex by the two second slanted surfaces is smaller than the angle made by sandwiching the apex by the first slanted surfaces; and a second bottom surface sandwiched by the two second slanted surfaces; wherein cutting blades are formed at an edge constituting the apex and at edges where the second bottom surface and the two second slanted surfaces intersect. the cutting blade component having a sharp point and formed with a shape whose degree of thickness decreases from the body part to the sharp point comprises: a first cutting blade part continuing from the sharp point; wherein the first cutting blade part comprises: two first slanted surfaces formed sandwiching an apex, and a first bottom surface sandwiched by the two first slanted surfaces; wherein cutting blades are formed at an edge constituting the apex and at edges where the first bottom surface and the two first slanted surfaces intersect; characterised in that the cutting blade component comprises a second cutting blade part continuing from the first cutting blade part; and in that the second cutting blade part comprises: the two first slanted surfaces formed sandwiching the apex; two second slanted surfaces having rims, which are approximately parallel to the apex, formed on the two respective first slanted surfaces, and on the apex side of the two second slanted surfaces, wherein an angle made by sandwiching the apex by the two second slanted surfaces is smaller than the angle made by sandwiching the apex by the first slanted surfaces; and a second bottom surface sandwiched by the two second slanted surfaces; wherein cutting blades are formed at an edge constituting the apex and at edges where the second bottom surface and the two second slanted surfaces intersect.