A developing device including: plural developing units each for developing an
electrostatic
image formed on an image bearing member with developer that contains toner and
carriers in a developing portion; a rotary member for mounting the plurality of
developing units thereon and rotating along a path that includes the developing
portion; and a containing pipe provided in the rotary member to contain excess
developer discharged from the developing units in association with a replenishment
of developer, in which the containing pipe is substantially non-rotatably provided,
and the developer in the containing pipe is fed utilizing the rotation of the rotary member.