Patent ID: 8725033

Claim:
An image forming device comprising: a main body having an opening; a belt disposed in the main body; a plurality of developing units arranged along an arrangement direction, each of the plurality of developing units comprising a developing roller defining an axis line; and a supporter configured to support the plurality of the developing units and to move, through the opening of the main body, from an inner side position located at an inner side of the main body to an outer side position located at an outer side of the main body, the supporter comprising: a first wall having a first passage through which developer is to pass and a second passage through which developer is to pass, the second passage being closer to the opening of the main body than the first passage, and a second wall separated from the first wall in an axial direction parallel to at least one of the axis lines of the developing rollers, the plurality of developing units being disposed between the first wall and the second wall, wherein a distance L 1 , in the axial direction, between the second passage and an imaginary plane perpendicular to the axial direction and passing the second wall, is greater than a distance L 2 , in the axial direction, between the first passage and the imaginary plane.