To provide a recording medium holder from which a recording medium can be taken out without damaging the surface of the recording medium and in which the recording medium can be securely held.

Holding pieces 6 are set in the standing-up state or in the state of being folded inside to clamp a part of the peripheral edge 2a of the recording medium 2 by the holding pieces 6 on both sides of a notch 9 to control movement. When the holding pieces 6 are opened outwardly, the notch 9 is positioned outside the peripheral edge 2a of the recording medium 2 to release the control on the side of the holding pieces 6 of the recording medium 2 so that the recording medium 2 can be easily taken out in the direction of almost crossing orthogonally a mount face.