PURPOSE: To enable required information to be observed through blank parts by superposing the holders disposed alternately with information parts and blank parts in plural sheets and moving one sheet thereof by one frame.

CONSTITUTION: A holder 1 has a picture frame 1a containing information 2 and transparent or opened blank parts 1b provided at every other line; in addition, protrusions 1d are provided in the different positions of the respective holders 1. Plural sheets of the holders 1 are superposed by providing some clearances and are contained in a containing box 3. When in this state, the required holder is selected by the operation of a handle 7 and said holder is moved by one frame against a spring 4 by depressing the protrusion 1d, then the image plane frame 1a where the required information is positioned may be ovserved through the blank part 1b. In this way, much information may be contained in the narrow places and if necessary the information may be readily selected and may be observed or photographed.