To provide a tool equipped with a screw to be rotated in a "ladle" with mesh type gaps since soybean paste is insufficiently dissolved with much labor and time when the soybean paste(solid-state) in a small spoon is stirred up in hot water with chopsticks in a process to cook the soybean paste soup.

A fixing board (2) is mounted onto the "ladle" (2) with the mesh type gaps. The screw (6) of a lower-stage rotary board (5) is rotated linked with an upper-stage rotary board (1). so that the soybean paste (solid-state) is stirred up, mixed and becomes liquid.