A toner cartridge includes: a casing; a partitioning wall; and an
operation member. The casing is configured to accommodate toner therein.
The casing is formed with a first casing opening. The partitioning wall
is configured to be rotatable relative to the casing around a
predetermined rotational axis. The partitioning wall has a side surface
that extends substantially parallel to the rotational axis and a pair of
opposite ends that are arranged opposing each other along the rotational
axis, a first partitioning-wall opening being formed through the side
surface of the partitioning wall, the first partitioning-wall opening
being selectively aligned with the first casing opening when the
partitioning wall is rotated relative to the casing. The operation member
rotates the partitioning wall relative to the casing, the operation
member including a pair of lever members rotatably supported on the
casing that when rotated apply a rotating operation to both of the pair
of opposite ends of the partitioning wall.