A file (1) includes: a cover member (2); a base plate (4) fixed to the inner surface of the cover member (2); first and second rod members (5, 6) standing vertically and mutually parallel on the base plate (4) with a certain gap between them; a pressure plate (7) orthogonal to the rod members (5,6) for pressing an object to be filed (S) toward the base member (4), through which the rod members (5, 6) pass, and that is shiftable so as to approach toward and recede from the base plate (4); and a locking mechanism (8) that is capable of locking the pressure plate (7) with respect to at least one of the rod members (5, 6) at any desired position in the longitudinal direction of the rod members (5, 6), so that it cannot shift in the direction to recede from the base plate (4).

A 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 position in a predetermined direction.