The developer container includes a cylindrical container main body and a supporting member. The container main body includes a concavity and a discharge hole. The supporting member covers a portion containing the concavity and the discharge hole all over the circumference and rotatably supports the container main body, and includes a leading through hole for guiding the developer outside. A container side guide portion is arranged close to the concavity of the container main body. The container side guide portion elastically comes into contact with the inner circumferential portion of the supporting member so as to guide the developer located between the container main body and the supporting member, into the concavity. A supporting side guide portion is arranged close to the leading through hole of the supporting member, for guiding the developer located between the container main body and the supporting member, into the leading through hole.