It is necessary to estimate the impact force received by the human body for the purpose of accident prevention, accident analysis and criminal investigations against contact of Machine and structure, fall, overturn and brutal blows of blunt instruments. In this study, we showed the performance of subcutaneous fat and muscle buffering by measuring the impact force to the pork. As a result, the following findings were obtained. 1) For estimation of buffer property of muscle and fat tissue of human to impact force, it is possible to substitute pork. 2) Skin is poorer on buffer property than muscle and fat tissue. 3) The magnitude of the impact force transmitted to the bone rises in proportion to a rise in impact velocity, and is estimated to be at least ten times the weight of impactor. 4) Exist as complex of skin, muscle and fat tissue, the impact force transmitted to the bone is not less than one-tenth compared with only skin.
