A walking measurement device, comprising: a timing detection unit that is configured to detect an impact generation timing at which an impact resulting from a landing of a left foot or a right foot has been generated; an acceleration sensor that is configured to repeatedly detect, at predetermined time intervals, an acceleration in a lateral direction along which the left foot and the right foot are arranged side by side; a first determination unit that is configured to determine whether the impact generation timing corresponds to a landing timing of the left foot or a landing timing of the right foot based on the impact generation timing detected by the timing detection unit and the acceleration detected by the acceleration sensor; and an acceleration integration unit that is configured to acquire an integrated value of the acceleration in the lateral direction detected by the acceleration sensor over an intermediate period between two consecutive impact generation timings consecutively detected by the timing detection unit, wherein the first determination unit is configured to compare two integrated values acquired with respect to two consecutive intermediate periods that are temporally separated by one impact generation timing and determine whether the one impact generation timing corresponds to the landing timing of the left foot or the landing timing of the right foot based on a result of the comparison, characterised by a second determination unit that is configured to determine whether an intermediate period between two consecutive impact generation timings corresponds to a period of one step of a walking motion, wherein when the results of the comparison obtained by the first determination unit with respect to the two consecutive impact generation timings are different from each other, the second determination unit is configured to determine the intermediate period between the two consecutive impact generation timings corresponds to the period of one step, and wherein when the two results of the comparison obtained by the first determination unit with respect to the two consecutive impact generation timings are the same, the second determination unit is configured to determine that the intermediate period between the two consecutive impact generation timings do not correspond to the period of one step. a timing detection unit that is configured to detect an impact generation timing at which an impact resulting from a landing of a left foot or a right foot has been generated; an acceleration sensor that is configured to repeatedly detect, at predetermined time intervals, an acceleration in a lateral direction along which the left foot and the right foot are arranged side by side; a first determination unit that is configured to determine whether the impact generation timing corresponds to a landing timing of the left foot or a landing timing of the right foot based on the impact generation timing detected by the timing detection unit and the acceleration detected by the acceleration sensor; and an acceleration integration unit that is configured to acquire an integrated value of the acceleration in the lateral direction detected by the acceleration sensor over an intermediate period between two consecutive impact generation timings consecutively detected by the timing detection unit, wherein the first determination unit is configured to compare two integrated values acquired with respect to two consecutive intermediate periods that are temporally separated by one impact generation timing and determine whether the one impact generation timing corresponds to the landing timing of the left foot or the landing timing of the right foot based on a result of the comparison, characterised by a second determination unit that is configured to determine whether an intermediate period between two consecutive impact generation timings corresponds to a period of one step of a walking motion, wherein when the results of the comparison obtained by the first determination unit with respect to the two consecutive impact generation timings are different from each other, the second determination unit is configured to determine the intermediate period between the two consecutive impact generation timings corresponds to the period of one step, and wherein when the two results of the comparison obtained by the first determination unit with respect to the two consecutive impact generation timings are the same, the second determination unit is configured to determine that the intermediate period between the two consecutive impact generation timings do not correspond to the period of one step.