The present invention relates to a raw soybean flour soaking apparatus for manufacturing tofu. The raw soybean flour soaking apparatus which soaks raw soybean flour in water comprises: a raw soybean flour storage hopper for storing raw soybean flour； a raw soybean flour transfer passage connected to a discharge port of the raw soybean flour storage hopper and transferring the raw soybean flour discharged to the discharge port； a transfer screw rotatably installed in the raw soybean flour transfer passage to transfer the raw soybean flour discharged therethrough toward a fixed amount supply port； a mixing hopper for mixing the raw soybean flour, which is continuously transferred by the transfer screw and supplied by a fixed amount per unit time through the fixed amount supply port, and water supplied by a fixed amount per unit time from the outside through a water supply pipe； a fixed amount supply pump connected to a discharge port of the mixing hopper, and pumping and supplying the raw soybean flour and the water per unit time while mixing the raw soybean flour and the water supplied from fixed amount supply port and the water supply pipe； a spiral soaking pipe having a supply end connected to a discharge port of the fixed amount supply pump and a discharge end connected to a crusher of a crushing process； and a water storage tank in which the spiral soaking pipe is spirally wound while being immersed in water at a predetermined temperature, such that the raw soybean flour transferred through the spiral soaking pipe is soaked at a constant temperature condition and is transferred while being transferred together with the water.본 발명은 두부를 제조하기 위한 생대두분 불림장치에 관한 것으로, 생대두분을 물에 불려주는 생대두분 불림장치에 있어서,생대두분이 저장되는 생대두분 저장호퍼와； 상기 생대두분 저장호퍼의 배출구에 연결되어 상기 배출구로 배출되는 생대두분을 이송시키는 생대두분 이송통로와； 상기 생대두분 이송통로에 회전가능하게 설치되어 통해 배출되는 생대두분을 정량공급구 쪽으로 이송시키는 이송스크류와； 상기 이송스크류에 의하여 연속해서 이송되어 정량공급구를 통해 단위시간당 정량씩 공급되는 생대두분과, 물공급관으로부터 외부에서 공급되는 물을 단위시간당 정량씩 공급되는 물이 혼합되는 혼합호퍼와； 상기 혼합호퍼의 배출구에 연결되어 상
