To provide a form method in which a unit itself is light-weight and it can be carried by hands and hence, which is efficient in reuse and inexpensive.

A plurality of column form panels 11 and fastening metal fittings 12 tightening adjoining column form panels together are provided to construct a column. The fastening metal fittings are constituted of fixing metal fittings 12a attached transferably in the horizontal direction to an adjoining column form panel, rotary ring metal fittings 12b rotatably equipped on the fixing metal fittings, bolt metal fittings 12c screwed in the rotary ring metal fittings, and corner metal fittings 12d fixed to the front end of the bolt metal fittings. Concrete is placed in the state the corner metal fittings 12d are arranged in the inside of the adjoining column form panels 11 and the column form panels 11 are removed by using the corner metal fittings 12d as supports in the placed concrete column 19.