a method and an apparatus for manufacturing bean curd is disclosed wherein the slurry which comprises milled soybeans which is obtained by grinding the soybeans after they have been dipped in water for about 12 hours and added water is heated in a vessel as the preparatory process for manufacturing the bean curd in two steps , i . e . in the first step the slurry is boiled by directly injecting into it in a sufficient amount , and in the second step the boiled slurry is succeedingly steamed by steam directly injected into the slurry , but in a reduced amount or indirectly heated through the vessel by steam , decreasing the destruction of the soybean protein and increasing the yield of the product .