A developer supply container comprising: an accommodating portion including one end portion provided with an opening, and drive receiving portion, wherein a developer accommodated in said accommodating portion is fed toward the opening by rotation of said accommodating portion; a discharging portion including a receiving portion into which said one end portion of said accommodating portion is inserted, and a discharge opening configured to discharge the developer supplied through said opening of said accommodating portion, wherein said accommodating portion is mounted to said discharging portion so as to be rotatable relative to said discharging portion; a sealing member configured to seal between said one end portion and said receiving portion by being elastically compressed between said one end portion of said accommodating portion and a part of said receiving portion of said discharging portion, with respect to a direction in which said one end portion is inserted into said accommodating portion; a projection; and a first restricting portion and a second restricting portion (43; 42) provided on said receiving portion of said discharging portion at positions upstream and downstream of said projection, respectively in the inserting direction and contactable to said projection to restrict an inclination of the rotational axis (R') of said accommodating portion relative to the inserting direction within a predetermined range, characterized in that the drive receiving portion is provided at an outer circumference of the one end portion and configured to receive a rotational driving force from an outside; the projection projects from an outer peripheral surface of said accommodating portion in a radial direction crossing with a rotational axis direction of said accommodating portion; and said first restricting portion is a locking claw projecting from an inner peripheral surface of said receiving portion toward an inside with respect to the radial direction, along the rotational direction. an accommodating portion including one end portion provided with an opening, and drive receiving portion, wherein a developer accommodated in said accommodating portion is fed toward the opening by rotation of said accommodating portion; a discharging portion including a receiving portion into which said one end portion of said accommodating portion is inserted, and a discharge opening configured to discharge the developer supplied through said opening of said accommodating portion, wherein said accommodating portion is mounted to said discharging portion so as to be rotatable relative to said discharging portion; a sealing member configured to seal between said one end portion and said receiving portion by being elastically compressed between said one end portion of said accommodating portion and a part of said receiving portion of said discharging portion, with respect to a direction in which said one end portion is inserted into said accommodating portion; a projection; and a first restricting portion and a second restricting portion (43; 42) provided on said receiving portion of said discharging portion at positions upstream and downstream of said projection, respectively in the inserting direction and contactable to said projection to restrict an inclination of the rotational axis (R') of said accommodating portion relative to the inserting direction within a predetermined range, the drive receiving portion is provided at an outer circumference of the one end portion and configured to receive a rotational driving force from an outside; the projection projects from an outer peripheral surface of said accommodating portion in a radial direction crossing with a rotational axis direction of said accommodating portion; and said first restricting portion is a locking claw projecting from an inner peripheral surface of said receiving portion toward an inside with respect to the radial direction, along the rotational direction.