To solve the problem that an ordinary jigsaw puzzle or picture puzzle has only one form of right answer, the right answer can be found relatively easily, the puzzle is poor in gaming properties (excitement), and a player is bored in relatively a short time.

A card puzzle rich in gaming properties can be provided by composing a group of nine rectangular cards 1-9 consisting of a first to ninth cards of a same size. Each of four different types of sign among five types of sign A-E is allocated to and shown on each of the four sides a-d of each of the cards 1-9 on a prescribed condition and the same type of the sign can be faced with each other on all the joint sections (12 in total) of each card when it is placed in a rectangular shape with 3 cards in the vertical line and 3 cards in the horizontal line.