Liquid ejection device including cartridge attachment portion and sheet roll holder positioned at front portion of casing

A liquid ejection device comprising:

• a casing having a front surface in which a discharge opening and an opening are formed, the casing defining therein an internal space;
• a holder configured to be accommodated in the internal space and configured to rotatably support a sheet roll including a continuous sheet, the holder supporting the sheet roll being rotatable about a rotation axis extending in a leftward/rightward direction perpendicular to a frontward/rearward direction and an upward/downward direction;
• a power transmission mechanism positioned beside the holder in the leftward/rightward direction and configured to transmit rotational driving force to the holder;
• a cartridge attachment portion positioned above the power transmission mechanism and configured to receive a cartridge storing liquid therein;
• a conveying mechanism positioned in the internal space and configured to convey the continuous sheet to the discharge opening;
• and
• a head positioned in the internal space and configured to eject the liquid to the continuous sheet,
• wherein an occupying range of the cartridge attachment portion is overlapped with an occupying range of the power transmission mechanism and outside of an occupying range of the sheet roll and the holder in the leftward/rightward direction, and
• wherein the cartridge and the holder are attachable to and detachable from the casing through the opening.