A developer container includes a containing device, a support member, and a crumbling device. The containing device contains developer therein and is rotated so as to transport the developer. The support member supports the containing device such that the containing device is rotatable. The support member has an outlet through which the developer transported by the containing device flows out. The crumbling device is supported such that the crumbling device is rotatable together with the containing device. The crumbling device is, when the containing device is rotated, rotated so as to crumble the developer. The crumbling device includes a body portion and an applying member. The body portion extends from a region near the containing device toward the outlet. The applying member is formed in the body portion. The applying member applies a force for transporting the developer toward the outlet when the crumbling device is rotated.