A developer container includes a container body, a transport unit, a support unit, and a protrusion. The container body includes a cylindrical accommodating space that accommodates a developer, and a discharge port. The transport unit transports the accommodated developer toward the discharge port by a transport blade. The transport blade moves so as to pass closely to an inner wall of the accommodating space. The support unit rotatably supports a rotating shaft of the transport unit. The support unit includes a connecting component that connects to an external element to receive external rotational power. The protrusion protrudes inward from the inner wall. When the transport unit reversely rotates in an opposite direction to a rotational direction in transporting the developer, the transport blade passes in contact with the protrusion and vibrates so as to touch the inner wall of the accommodating space.