PURPOSE: To execute the perfect curing of a MACHI block (a kind of concrete block) and improve the quality of the block by giving a temperature difference between a flovable concrete and a semicured concrete in a curing chamber. when the MACHI block produced by curing the flovable concrete charged in a mold frame is cured into a semi-cured concrete in the curing chamber and subsequently perfectly curing the semi-cured concrete to produce the MACHI block.

CONSTITUTION: A method for producing the MACHI block, characterized by separating the curing chamber 18 into the first curing chamber 18a and the second curing chamber 18b with a bulkhead in parallel, receiving a mold frame 8 charged with a flowable concrete 9 in the first curing chamber, curing the flowable concrete into the semi-cured concrete, receiving the formed semi-cured concrete 11 in the second curing chamber, and subsequently curing the semi- cured concrete 11 into the perfect cured concrete in the second curing chamber, and further repeating the above-mentioned processes.