An umbilical member arrangement unit for an umbilical member, having a function for automatically adjusting each coefficient used in the physical simulation model, corresponding to the actual behavior of the umbilical member. A simulation device has a three-dimensional model generating part configured to generate a three-dimensional model of a umbilical member as a stereo structure constituted by a plurality of mass points and a spring connecting the mass points to each other; a simulating part configured to carry out a physical simulation; a storing part configured to previously store an actual static behavior, an actual dynamic behavior, and an actual dynamic behavior of the umbilical member when colliding with a rigid body; and an automatically adjusting part configured to carry out automatic adjustment so that a result of the physical simulation coincides with the actual behaviors stored in the storing part.