PROBLEM TO BE SOLVED: To provide a device capable of specifically indicating how the lateral difference appears in a walking action of a person to be measured.SOLUTION: A walking posture meter 100 for evaluating a walking posture of a person to be measured includes an acceleration sensor 112 which is mounted on a midline of a lumbar part of the person to be measured, and an operation part. The operation part calculates Z feature quantity and X feature quantity indicating the degree of the difference between the acceleration in vertical and longitudinal shaft directions of a lumbar part in a left leg reference period and the acceleration in the vertical and longitudinal shaft directions of the lumbar part in a right leg reference period using a temporal change waveform of the triaxial acceleration outputted by the acceleration sensor, and a Y feature quantity indicating the degree of the difference between the deviation of the path in the lateral shaft direction of the lumbar part in the left leg reference period and the deviation of the path in the lateral shaft direction of the lumbar part in the right leg reference period by performing second-order integration of the lateral shaft acceleration outputted by the acceleration sensor.【課題】被測定者の歩行動作においてどのように左右差が現れているかを具体的に示すことができる装置を提供する。【解決手段】被測定者の歩行姿勢を評価する歩行姿勢計１００であって、被測定者の腰部の正中線上に装着される加速度センサ１１２と、演算部と、を備える。演算部は、加速度センサが出力する三軸加速度の時間的な変化波形を用いて左脚基準期間における腰部の上下・前後軸方向の加速度と右脚基準期間における腰部の上下・前後軸方向の加速度との間の差異の程度を示すＺ特徴量、Ｘ特徴量を算出するとともに、加速度センサが出力する左右軸加速度を二階積分して左脚基準期間における腰部の左右軸方向の軌道の変位と右脚基準期間における腰部の左右軸方向の軌道の変位との間の差異の程度を示すＹ特徴量を算出する。【選択図】図１
