PURPOSE: To reduce the cost and at the same time to obtain a suturing needle excellent in piercing property by moving a grinding sheet in the lengthwise direction, arranging the central axis of the stock for a suturing needle nearly at right angles to the moving direction of a grinding sheet, pressing the stock to the grinding sheet and grinding it.

CONSTITUTION: The stock (a) is grasped by a chuck 11 and approached to a grinding surface 4. In this time, the stock (a) is arranged so that the direction of the central axis of the stock (a) takes the direction crossed at right angles to the direction moving the grinding sheet 2. As the grinding sheet 2 is moved in the direction of an arrow (c) or in the directions of arrows (a, b), a specified force acts on the stock (a) and the stock is pressed on the grinding sheet 2 to carry out grinding operation. In this way, it is possible to obtain a suturing needle having a good piercing property.