To provide a new adamantane derivative useful as a raw material for a functional material having excellent electrical characteristics, thermal characteristics, mechanical characteristics, optical characteristics, physical characteristics and the like.

The teraadamantane derivative is represented by formula (1) (wherein, R1 to R10 are the same or different and each a hydrogen atom, an alkyl group which may have a halogen atom, an alkoxy group which may have a halogen atom, a halogen atom or a hydroxy group; with the proviso that at least one of the R1 to R10 is a halogen atom or a hydroxy group).