To easily create a creative expression simulating a beautiful impressive view of a town on the slope of a mountain as an opportunity to create a landscape by freely combining a variety of picture materials of a favorite distant view or a near view as a symbolic image Provide a base that can be done.A support body 22, a reinforcement body 20 connected and fixed to the back face of the support column body 22, a plurality of support bodies having a support groove 11 for supporting the picture material and detachably attached to the support column body 10, a guide structure fixed to the support column 22, for guiding a plurality of supports 10 respectively, and a holder 27 for holding the position of the support 10. The guide structure includes a plurality of guide members 48 for guiding the support 10. Each of the plurality of supports 10 is guided along the extending direction of the guide member 48 and held by a holder 27 at a predetermined position, and the guide member 48 is guided in a direction crossing the direction in which the guide member extends In the form of an array.BACKGROUND OF THE INVENTION
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