This golf gear fitting system (2) is provided with: a swing data acquiring unit (21) that acquires swing data from a sensor (11) attached to a golf club (1); a swing data storing unit (22) that stores the swing data acquired by the swing data acquiring unit (21); a data classifying unit (23) that classifies the swing data stored in the swing data storing unit (22); and a data predicting unit (24) that predicts swing data of a specification not measured by the sensor (11) by referring to the swing data classified by the data classifying unit (23).
