To provide following problems that in conventional calendars which display plural months, a rear surface of a calendar sheet was not used and became diseconomy, and an alignment sequence of a calendar displaying months was not time sequence, or a calendar position of this month changed every month and made a user troublesome when the user looks for a target date, and a calendar sheet which is bellows-folded remained fold of the sheet even it is hung, so the calendar sheet did not become plain and it was not easy to look at.

The calendar device of the invention is a calendar device comprising:calendar sheets which can be folded per month; and a fulcrum having guide grooves of the calendar sheets. And the calendar device can display plural months.