A walking training apparatus is a support motion measurement system for measuring a support motion performed for a training motion of a trainee by a training staff member assisting the trainee to perform training of a preset motion. The support motion measurement system includes a training motion detection unit, a support motion detection unit, and an identification unit. The training motion detection unit detects the training motion. The support motion detection unit detects at least one of a timing, a position, a direction and strength of the support motion received by the trainee from the training staff member in the training motion. The identification unit identifies the support motion for the training motion based on a motion pattern of the training motion.