PROBLEM TO BE SOLVED: To promote the breeding of spiny lobster by heightening the bottom-clinging number of postlarvae and the survival rate of fry of the same.SOLUTION: A block 1 for breeding spiny lobsters obtained by forming, in side face parts, a plurality of kinds of concave parts having different sizes in inner diameters and depths for allowing postlarvae and fry of spiny lobsters to change the living places according to the growth is installed on a bedrock 7, and the block 1 for the breeding and seaweeds 6 are surrounded by a net to protect them from bite injury. As a result, the proliferation of the seaweeds 6, and the increase of the bottom-clinging number and the living number of postlarvae and fry of spiny lobsters are expected even in a seawater-damaged sea area caused by seaweed-eating fishes or the like to contribute to the secure and increase of the resource of the spiny lobsters.
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