A development roller includes a base unit having a base recess and a base
projection that are formed in a predetermined area of a circumference
surface of the base unit, and a surface layer formed on the circumference
surface of the base unit and having on the circumference thereof a recess
and a projection formed respectively in accordance with the base recess
and the base projection of the base unit. Surface hardness of the
projection is higher than surface hardness of the recess.