This orthosis manufacturing system is designed to manufacture an orthosis to be fitted on a human body and provided with: an orthosis modeling data generation unit (2) for generating orthosis modeling data (D4) for the orthosis on the basis of three-dimensional data (D1) of the human body generated by measuring the shape of a portion of the human body to which the orthosis is to be fitted, a model shape data (D2) for the orthosis, and manufacture history data (D3) relating to other orthoses manufactured in the past； and an orthosis formation unit (3) for three-dimensionally forming the orthosis on the basis of the modeling data (D4).
