PROBLEM TO BE SOLVED: To improve a condition of use of a booklet body by preventing a booklet sub-unit from easily missing without spoiling its convenience of attaching and detaching in a booklet body in which the booklet sub-units are attached and detached.;SOLUTION: In the booklet sub-units 2 which can be held so as to be attached and detached on a cover body 1A, and can constitute the booklet body 1 under a laminated condition, a movable part 21 coming into contact with and separating from an outer edge part 2x on the outer edge part 2x on the side held on the cover body 1A is provided, and the booklet sub-unit 2 is attracted to the cover body 1A by a magnetic force on this movable part 21.;COPYRIGHT: (C)2007,JPO&INPIT
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