An image formation apparatus has an image formation unit that forms toner images
on an image holding member. A primary transfer unit transfers toner images on the
image holding member onto an intermediate transfer member. A secondary transfer
unit transfers toner images on the intermediate transfer member onto a recording
medium. An electrically-grounded contact member first comes into contact with the
intermediate transfer member downstream from a primary transfer portion. The relationship
is satisfied, in which L (mm) represents the distance from the primary transfer
portion to a position where the intermediate transfer member first comes into contact
with the contact member, Vtr (V) represents the absolute value of applied voltage
to the primary transfer unit, s (mm/sec) represents the moving speed of the intermediate
transfer member, and (/) represents the surface resistivity
of the intermediate transfer member.