Roll medium feeding shaft

A roll medium feeding shaft to be inserted into a through hole of a roll medium formed by winding a long recording medium, the roll medium feeding shaft comprising:

• a holding member configured to be inserted into the through hole and to be rotated about a rotary axis together with the roll medium;
• a support part provided to one end of the roll medium feeding shaft and configured to support the holding member in a vertical direction when placed on a horizontal surface;
• and
• a shaft provided inside the holding member and configured to be movable inside the holding member along the rotary axis, wherein
• the shaft is configured to be in one of
• a first state where one end of the shaft does not protrude from the support part, and
• a second state where the one end of the shaft protrudes from the support part, and
• when the one end of the shaft is oriented downward in the vertical direction and the support part is placed on the horizontal surface, the shaft is in the first state.