To prevent a plurality of mutual decorative panels from simply separating even under a soil pressure when soil is introduced into a space surrounded by the decorative panels and maintain an assembled state by mutual decorative panels without fixing thereof to the ground surface.

This assembled flower bed is obtained by arranging a plurality of mutually adjacent decorative panels 1 in a planar direction thereof so as to mutually freely connect and separate the adjacent mutual panels, attaching reinforcing frames 4 to the peripheral parts of respective back surfaces of the decorative panels 1, distributing mutually freely fittable protruding ridge parts and groove parts in the direction of the surfaces of the decorative panels 1, forming the protruding ridge parts and groove parts along the lateral side parts in the respective reinforcing frames 4 in both the lateral side parts adjacent to other materials in the decorative panels 1 and providing freely fittable connecting members 7 over both the reinforcing frames 4 so as not to mutually separate the adjacent reinforcing frames 4 connected by fitting of the protruding ridge parts with the groove parts.