To provide cross-linked organic-inorganic composite particles coated with a benzocyclobutene compound, exhibiting a low linear expansion coefficient.

There is provided a benzocyclobutene compound represented by Formula (1) where n is an integer from 0 to 2, R₁ and R₂ independently represent a hydrogen atom or a saturated hydrocarbon group having 1 to 5 carbon atoms, and A is a group selected from direct bond, substituted or unsubstituted chain saturated divalent hydrocarbon groups having 1 to 20 carbon atoms.