To provide a concrete placing form which achieves extension of the life thereof, especially in cold climate areas.

The concrete placing form 1 consists of a pair of side sheathing boards 2, 2, a bottom sheathing board 3 arranged between lower edges of the side sheathing boards 2, 2, and end sheathing boards 4 arranged between both edges of the side sheathing boards 2, 2. These sheathing boards are each made of a board member obtained by expanding an ABS resin (acrylonitrile-butadiene-styrene resin), an HDPE resin (high density polyethylene resin), or a PP resin plate (polypropylene resin) foamed by 1.2 to 3.5 times.