In old age, people tend to display a wide range of body types that differ significantly from the average or standard body type. In order to obtain an accurate understanding of the characteristics of body type of people who are in their old age, an analysis of deformed body type that deviates considerably from the overall average is highly important. This study has sought to examine closely their distinctive features of deformation in each part of the body and suggest the criteria for assessing the deformation of lateral body. The subjects are 220 elderly women who are over 60 years of age and the research data was collected by the direct measurement and indirect measurement using the photographs of lateral body of subjects. First, based on a visual observation of the lateral body of subjects, the five body parts which were related with the deformation of lateral body were chosen. They were the parts which were based on the five landmarks, Cervicale, Back Protrusion, Abdominal Protrusion, Buttock Protrusion and Midpatella. Second, in order to reveal the characteristics of deformation of the lateral body, this study has come up with a set of criteria for assessing the deformation by computing the sum and the difference of thickness of the front and back in five body parts, the angle of the knee. The criteria include the five sum items of thickness of the front and back, three difference items of thickness of the front and back, and two items of knee angle. And the criteria include the mathematical formula that is if the sum or the difference of thickness or the angle of the knee of the subject are x and ``(χ-2σ)<=x<(χ +2σ)``, the subject has the normal body type. If the x<(χ-2σ) or x>=(χ+2σ), she has the deformed body type. The study has also examined the distinctive features of lateral posture, BMI and the categories of upper/lower lateral body type of deformed shape.