Patent ID: 8870366

Claim:
A medium loading apparatus comprising: supporting units that have medium holding portions which are attached to both end portions of a roll medium obtained by winding and overlapping a long medium in a roll form in an integrally rotatable manner with the roll medium and medium supporting portions which support the medium holding portions in a rotatable manner; a loading unit that is loaded with the roll medium to which the supporting units are attached, and a rotational force transfer unit that is arranged on the loading unit so as to be opposed to the medium holding portion in the axial line direction of the roll medium and transfers a rotational force of a rotation driving unit to the medium holding portion, wherein the rotational force transfer unit includes: a first shaft member to which the rotational force of the rotation driving unit is transferred; a rotating member that is supported by the first shaft member in an integrally rotatable manner in a state where a rotational axial line is variable, and a second shaft member that is supported by the rotating member in an integrally rotatable manner and is configured to be movable between a transfer position at which the second shaft member is engaged with the medium holding portion and transfers the rotational force and a non-transfer position at which the second shaft member is distanced from the medium holding portion and does not transfer the rotational force.