A fabrication method of a surface magnet type motor having a magnet at a surface of a rotor, comprising: step (a) of forming an anti-scattering tube, covering the surface of the magnet at said rotor to prevent scattering of the magnet, in a cylindrical configuration longer in length than said magnet in an axial direction, and step (b) of press-fitting said magnet into said anti-scattering tube; wherein said step (b) includes step of press-fitting said magnet into said anti-scattering tube to form a projection portion (17b, 17c) protruding from each of both end faces of said magnet, wherein the projection portion (17b, 17c) is thinner than the portion excluding the projection portion, step of attaching an assembly flange (18, 19) to said projection portion to clamp said anti-scattering tube by said assembly flange, and step of, after said step, attaching said rotational shaft and bearing to said anti-scattering tube while applying axial force to said anti-scattering tube in a direction of the rotational shaft via said bearing to mount said rotor in a housing of said surface magnet type motor; the fabrication method being characterized in that: at step (b), said magnet is press-fitted into said anti-scattering tube while constituting a stress alleviation portion alleviating stress generated at an end of said magnet stored in said anti-scattering tube, the stress alleviation portion taking a configuration of suppressing a displacement difference in a direction of an inner diameter generated between said projection portion (17b, 17c) and a portion of said tube excluding said projection portion (17b, 17c) by press-fitting; and the assembly flange (18, 19) comprises a cylindrical portion (18b, 19b) which is fitted with play into an inner circumference of the anti-scattering tube. step (a) of forming an anti-scattering tube, covering the surface of the magnet at said rotor to prevent scattering of the magnet, in a cylindrical configuration longer in length than said magnet in an axial direction, and step (b) of press-fitting said magnet into said anti-scattering tube; wherein said step (b) includes step of press-fitting said magnet into said anti-scattering tube to form a projection portion (17b, 17c) protruding from each of both end faces of said magnet, wherein the projection portion (17b, 17c) is thinner than the portion excluding the projection portion, step of attaching an assembly flange (18, 19) to said projection portion to clamp said anti-scattering tube by said assembly flange, and step of, after said step, attaching said rotational shaft and bearing to said anti-scattering tube while applying axial force to said anti-scattering tube in a direction of the rotational shaft via said bearing to mount said rotor in a housing of said surface magnet type motor; the fabrication method being characterized in that: at step (b), said magnet is press-fitted into said anti-scattering tube while constituting a stress alleviation portion alleviating stress generated at an end of said magnet stored in said anti-scattering tube, the stress alleviation portion taking a configuration of suppressing a displacement difference in a direction of an inner diameter generated between said projection portion (17b, 17c) and a portion of said tube excluding said projection portion (17b, 17c) by press-fitting; and the assembly flange (18, 19) comprises a cylindrical portion (18b, 19b) which is fitted with play into an inner circumference of the anti-scattering tube. at step (b), said magnet is press-fitted into said anti-scattering tube while constituting a stress alleviation portion alleviating stress generated at an end of said magnet stored in said anti-scattering tube, the stress alleviation portion taking a configuration of suppressing a displacement difference in a direction of an inner diameter generated between said projection portion (17b, 17c) and a portion of said tube excluding said projection portion (17b, 17c) by press-fitting; and the assembly flange (18, 19) comprises a cylindrical portion (18b, 19b) which is fitted with play into an inner circumference of the anti-scattering tube.