An arc path-forming part (100, 200, 300, 400, 500) comprising: a magnet frame (110, 210, 310, 410, 510) having a space part (115, 215, 315, 415, 515), in which a fixed contactor and a movable contactor are accommodated, formed therein; wherein a length of the space part (115, 215, 315, 415, 515) in one direction is formed to be greater than a length thereof in the other direction, the magnet frame (110, 210, 310, 410, 510) includes: a first surface (111, 211, 311, 411, 511) and a second surface (112, 212, 312, 412, 512) which extend in the one direction, are disposed to face each other, and are configured to surround a portion of the space part (115, 215, 315, 415, 515); and a third surface (113, 213, 313, 413, 513) and a fourth surface (114, 214, 314, 414, 514) which extend in the other direction, are continuous with the first surface (111, 211, 311, 411, 511) and the second surface (112, 212, 312, 412, 512), respectively, are disposed to face each other, and are configured to surround a remaining portion of the space part (115, 215, 315, 415, 515), characterised by a Halbach array (120, 220, 320, 420, 520) located in the space part (115, 215, 315, 415, 515) of the magnet frame (110, 210, 310, 410, 510) and configured to form a magnetic field in the space part (115, 215, 315, 415, 515), whereby the Halbach array (120, 22, 320, 420, 520) includes a plurality of blocks disposed side by side in the other direction and formed of a magnetic material, and is disposed adjacent to one or more surfaces of the third surface (113, 213, 313, 413, 513) and the fourth surface (114, 214, 314, 414, 514). a magnet frame (110, 210, 310, 410, 510) having a space part (115, 215, 315, 415, 515), in which a fixed contactor and a movable contactor are accommodated, formed therein; wherein a length of the space part (115, 215, 315, 415, 515) in one direction is formed to be greater than a length thereof in the other direction, the magnet frame (110, 210, 310, 410, 510) includes: a first surface (111, 211, 311, 411, 511) and a second surface (112, 212, 312, 412, 512) which extend in the one direction, are disposed to face each other, and are configured to surround a portion of the space part (115, 215, 315, 415, 515); and a third surface (113, 213, 313, 413, 513) and a fourth surface (114, 214, 314, 414, 514) which extend in the other direction, are continuous with the first surface (111, 211, 311, 411, 511) and the second surface (112, 212, 312, 412, 512), respectively, are disposed to face each other, and are configured to surround a remaining portion of the space part (115, 215, 315, 415, 515), characterised by a Halbach array (120, 220, 320, 420, 520) located in the space part (115, 215, 315, 415, 515) of the magnet frame (110, 210, 310, 410, 510) and configured to form a magnetic field in the space part (115, 215, 315, 415, 515), whereby the Halbach array (120, 22, 320, 420, 520) includes a plurality of blocks disposed side by side in the other direction and formed of a magnetic material, and is disposed adjacent to one or more surfaces of the third surface (113, 213, 313, 413, 513) and the fourth surface (114, 214, 314, 414, 514). a first surface (111, 211, 311, 411, 511) and a second surface (112, 212, 312, 412, 512) which extend in the one direction, are disposed to face each other, and are configured to surround a portion of the space part (115, 215, 315, 415, 515); and a third surface (113, 213, 313, 413, 513) and a fourth surface (114, 214, 314, 414, 514) which extend in the other direction, are continuous with the first surface (111, 211, 311, 411, 511) and the second surface (112, 212, 312, 412, 512), respectively, are disposed to face each other, and are configured to surround a remaining portion of the space part (115, 215, 315, 415, 515), characterised by a Halbach array (120, 220, 320, 420, 520) located in the space part (115, 215, 315, 415, 515) of the magnet frame (110, 210, 310, 410, 510) and configured to form a magnetic field in the space part (115, 215, 315, 415, 515), whereby the Halbach array (120, 22, 320, 420, 520) includes a plurality of blocks disposed side by side in the other direction and formed of a magnetic material, and is disposed adjacent to one or more surfaces of the third surface (113, 213, 313, 413, 513) and the fourth surface (114, 214, 314, 414, 514).