Six normal male and one Parkinsonism male adults were participated in this study. These subjects walked five times in three different speeds i.e. slow, normal and fast, on five meter length way. Two sensor-units for detecting tri-axial angular velocity were made with six miniature gyroscope sensors. Two sensor-units were mounted on the lateral side of right thigh and right shank of subjects. Angles and angular accelerations about tri axes were calculated from angular velocity recorded with sensor-units. From the measurements with two sensor-units, it is suggestive that movement about x and y axis are important information for analyzing not only the characteristics of gait but also the body balance during walking and the influence of nervous system on walking.