To provide a foundation for installation of a column, which can be easily installed and removed, is stably in strength, and has a wide application range.

A soil cement column body 2 is formed in ground. A tubular column body 3 made of a steel pipe is embedded in the soil cement column body 2. A lower end 5a of a column 5 is erected in the tubular column body 3. A clearance between the lower end 5a of the column 5 and the tubular column body 3 is filled with a cement-based slurry 10. Plurality of protrusions or recesses 3a are formed on an outer periphery and/or an inner periphery of the tubular column body 3. A bottom cover 6 is attached to the lower end of the tubular column body 3.