To provide the guide structure of an interlocking paper-sliding door in which a rack is engaged with a pinion under a normal state by holding the rack at a fixed position and the sliding operation of the movable fitting section can be conducted smoothly.

The guide structure of the interlocking paper-sliding door in which racks 51, 52 are installed on the sides of each of a pair of paper-sliding doors 4, 5 while a pinion 53 engaged with the racks 51, 52 is mounted between these racks 51, 52 and a pair of the paper-sliding doors 4, 5 are interlocked freely through these racks 51, 52 and the pinion 53 is constituted by securing rack guides 60 controlling the movement of the racks 51, 52 in the separating direction from the pinion 52 on the sides of the racks 51, 52.