Provided is a development device including: a development roller in which
continuous spiraling inclined grooves having different inclinations with
respect to an axial direction are formed so as to cross each other; and a
feed roller which is in contact with the development roller and feeds
toner to the development roller, wherein transportation force, which is
used for transporting the toner on the development roller from one side
to the other side of the axial direction of the development roller, is
generated by the rotation of the feed roller.