PURPOSE: To provide the page turning device capable of turning pages of a plurality of kinds of passbooks having various sizes.

CONSTITUTION: To a support 4 movable up and down, a plurality of links 12 and 13 are connected rotatably in opening direction of legs. On rotating idle ends of those links 12 and 13, rollers 24 for receiving rotation of a belt through a one-way clutch are provided. To only one of the rollers 24 which contacts with right and left pages of an opened passbook, rotation of a motor 16 rotatable normally and reversely is transferred, so that the roller 24 and a belt 20 turn pages in optional direction. Also, the interval between the rollers 24 is adjusted by rotating the links 12 and 13 so as to make it possible to turn pages even if the size of the passbook is different.