To provide a convenient paper roll holder keeping a rolled paper available for use at any time.

A first arm 1 and a second arm 2 are formed by bending a U-shaped parallel frame into a U shape. A mounting means 5 on a fixed surface W is attached by providing a base part 3 on the second arm 2. An extending and contracting supporting arm 9 where the rolled paper P is rotatably fit/supported is constituted by providing a slider 8 using the first arm 1 as a sliding part. The paper roll is set quite easily by inserting a fitting hole of the rolled paper P in the supporting arm 9, and a rolled paper P with the cylinder of a different length is used for the paper roll holder easily by extending or contracting the supporting arm 9.