Dresser and dressing apparatus

摘要

A dresser (21) for dressing a polishing pad used for polishing a material to be polished is disclosed, the dresser (21) comprising: a dresser principal (22) and a dressing-working part (23) which is provided as a body other than the dresser principal (22); and a holding means for holding the dressing-working part (23) in such a manner that the dressing-working part (23) can be attached to and detached from the dresser principal (22).