<p>A developer container for use in an image forming apparatus, comprising:
a container (132Y), said container (132Y) having two ends and a lateral surface extending between the two ends wherein the container (132Y) is equipped with a bottle main part (133Y) which is a hollow cylindrical component configured to accommodate developer and the bottle main part (133Y) has a circular opening (C);
a cap portion (134Y) which includes a hollow cylindrical component and the cap portion (134Y) is configured to cover the end of the bottle main part (133Y) having the circular opening (C), wherein the cap portion (134Y) further includes an outlet (D) which is provided to face in the downward perpendicular direction of said container (132Y) for discharging the developer which is received from the circular opening (C) of the bottle main part (133Y); and
a container gear (137Y) as a drive receiving unit is configured to receive a rotational force from the lateral direction of said container (132Y) to facilitate the discharging of the developer, wherein the gear is provided to be at least partially surrounded by the cap portion (134Y) and at least partially exposed to an exterior of the cap portion (134Y); and
an engagement projection (134a) which is formed adjacent to the gear and configured to engage the bottle main part (133Y) and the cap portion (134Y).</p>
