An image-forming device includes: a main body; a plurality of developing units; a holding unit; a guiding unit; and a lifting mechanism. Each developing unit is configured to accommodate developer, and has a developing roller. The holding unit is configured to hold the plurality of developing units. The guiding unit is configured to enable the holding unit to move between an inside position that is inside the main body and an outside position that is outside the main body. The lifting mechanism includes a door provided on the main body. The lifting mechanism is configured to allow the guiding unit to move up and down in association with opening and closing of the door.