Patent ID: 8850666

Claim:
A button comprising: a button body that is placed over a first main surface of a sheet having the first main surface and a second main surface opposing to the first main surface, the button body having a hole over the first main surface; and a fixing member including a base that is placed over the second main surface, and a shaft that projects from the base and passes through the hole of the button body from the second main surface of the sheet, wherein a distal portion of the shaft comprises: a plate-like base portion provided over the button body and covering the hole, the plate-like base portion having a surface opposite to the button body; a plurality of first ribs integrally formed on the surface of the plate-like base portion, each first rib radially extending from a center toward a circumference of the plate-like base portion; and an annular portion which is integrally formed on the surface of the plate-like base portion and to which respective center ends of the plurality of first ribs are coupled.