The invention discloses a file. The file is configured to move a slider on a substrate, and a document that is placed on the substrate is pressed in a direction approaching the substrate, such that the slider can reliably stop at a position where the slider holds the document and a position where the slider does not hold the document where the slider is located at the respective positions. The structure of the base plate for preventing movement of the slider in the direction different from the movement direction is simplified. There is provided a file having a structure in which a protrusion and an erected wall are not provided in a slider, a guide plate and the like are not provided in a base plate by welding or adhesion, and movement of the slider is regulated to a predetermined positionin a predetermined direction.