A metallic male snap part capable of coupling with a female snap part where the projection of the male snap part can be coupled to a depression of the female snap part. The projection includes multiple relatively highly deformable portions and multiple relatively low deformable portions, the highly and low deformable portions being arranged alternately in the circumference direction of the projection. The highly deformable portions are more deformable elastically in the radial direction of the projection than the low deformable portions. Each of the highly deformable portions has a relatively large, outer bulge which bulges more outward in the radial direction than a relatively small, outer bulge of each of the low deformable portions. The projection further includes longitudinal slits and lateral slits to partition the projection into the highly deformable portions and the low deformable portions.