To provide a backbone pulling-up type file with a trimming spacer without difficulty of reading a character, symbol of a backbone outside column even at the time of arranging and storing many and receiving a lateral pressure by substantially perpendicularly pulling up a backbone to a cover and a back cover without bulk like prior art at the time of no use by doubling a film.

A trimming spacer 5 of a rectangular channel-like or roof shape having a fastening means to an inner surface of a back cover in which a width is substantially equal to a width of an inner surface of the backbone 2, both sides are substantially perpendicular to the inner surface of the backbone and a thickness is several times as large as a thickness of the backbone is fixed to or formed at the inner surface of the backbone 2 to operate as a support between the cover 1 and the back cover 3.