A label roll core holder for a labeler is provided that can reliably hold a label roll and its core, facilitate the work of loading and removing the same, reliably protect the label roll by the protective cover, and are of a simple structure that can be compactly configured in a compact space.
Focusing on constituting core holding members for holding the label roll (core holding lug members 13) to be of pivoting type and on spring biasing the pivoting type core holding members, the invention is characterized in having a pair of spring plates 11 and a pair of core holding lug members 13 between a pair of left and right side plates 3, the core holding lug members 13 each having a rotation shaft 20, a core holding portion 21, and a lug portion 22 that is located on the opposite side from the core holding portion 21 and projects outward of the side plate 3, and the spring plates 11 being capable of biasing the core holding portions 21 of the core holding lug members 13 in the direction of their core holding attitude.