A developer replenishment container configured to be detachably attachable to a developer replenishment device and replenish via the developer replenishment device is disclosed. The developer replenishment container including: a developer replenishment portion with a replenishment port; a developer accommodation portion having accommodate a developer; and an annular seal member for sealing a gap between the developer replenishment portion and the developer accommodation portion. The developer accommodation portion has an annular abutment portion provided at an end portion on a developer replenishment portion side in a direction of an axis which is a rotation center of the developer accommodation portion and provided to be in contact with the seal member in the direction of the axis; and a projecting portion provided near the abutment portion and provided to project toward the developer replenishment portion further than the abutment portion in the direction of the axis.

An example toner cartridge includes a toner container to contain toner, the toner container including a toner outlet, a toner transport member arranged in the toner container to transport the toner to the toner outlet by rotating with respect to a rotation shaft in a first direction, and a waste toner container including a waste toner inlet to receive waste toner, the waste toner inlet arranged in a side portion of the toner container in the first direction. A dispersing member to transport the waste toner in the second direction and disperse the waste toner therein may be arranged in the waste toner container. A driving transfer member may receive rotation power from the toner transport member to drive the dispersing member.

A toner cartridge includes a first accommodating portion that accommodates toner, and a second accommodating portion that accommodates toner. A first connection portion that is provided at the first accommodating portion connects the first accommodating portion to the outside. A second connection portion that is provided at an end portion of the second accommodating portion connects the second accommodating portion to the outside. A wall of the second accommodating portion that is located on one side of a second direction that intersects with the first direction has a curved portion that protrudes toward one side of the second direction, and the curved portion includes the part of the wall of the second accommodating portion that overlaps with the second connection portion in the second direction.