The present invention relates to an SRM of an improved rotor structure, and more particularly, to an "SRM of an improved rotor structure" for reducing torque ripple by improving the shape of a rotor pole. SRM of the improved rotor structure according to an embodiment of the present invention is a stator having a plurality of stator poles; and a rotor accommodated inside the stator and provided with a plurality of radially rotating magnetic poles but rotating about the rotor shaft, wherein the rotational magnetic poles have a uniform air gap at the distal end that starts to meet the stator magnetic poles along the rotational direction. Maintain, passing through 2/3 of the width of the rotating magnetic pole to form a non-uniform void, and at the same time form two through-holes parallel to the rotor axis direction at a predetermined depth of the section forming the non-uniform void along the rotational direction Maintaining a non-uniform air gap at the tip that starts to meet the first rotating magnetic pole and the stationary magnetic pole along the direction of rotation, forming a uniform air gap before passing 1/3 of the width length of the rotary magnetic pole while forming the non-uniform air gap At a predetermined depth of the section, a second rotational magnetic pole having two through-holes formed along the rotational direction parallel to the rotor axis direction is formed.
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