Polyolefin chain-containing silicon compound of the present invention is characterized in that it has a specific polyolefin groups and silicon residues. Further, the olefin polymer of the present invention is characterized in that it has a specific polyolefin group, a specific silicon-containing group as a coupling unit.
According to the present invention, novel polyolefin chain-containing silicon compound that does not like the mechanical properties are impaired is obtained efficiently. According to the invention, it is not to be impaired, such as mechanical properties, excellent olefin polymer chemical stability, can be produced with freely material design.