Provided is a motion analyzing apparatus that can be easily handled and provide analysis information with sufficient accuracy. A sensor unit (10) is installed to a target object and detects a given physical amount. A data acquisition unit (202) acquires output data of the sensor unit in a period including a first period for which a real value of a value of m time integrals of the physical amount is known and a second period that is a target for motion analysis. An error time function estimating unit (204) performs m time integrals of the output data of the sensor unit and estimates a time function of an error of a value of the physical amount detected by the sensor unit with respect to the real value based on a difference between a value of m time integrals of the output data and the real value for the first period. A data correcting section (206) performs the process of correcting the value of the m time integrals of the output data of the sensor unit for the second period based on the estimation result of the error time function estimating section. A motion analysis information generating section (208) performs the process of generating information used for analyzing the motion of a target object based on the value of the m time integrals for the second period that has been corrected by the data correcting section.