To provide a 4,4'-diphenol compound and a 4,4'-diphenoquinone compound, having a low melting point of the crystal, excellent in solubility, and having a ≥6C branched alkyl group or substituted alkyl group.

(1) This diphenol compound is represented by general formula (1) (wherein, R1 and R2 are each a hydrogen atom, a hydrocarbon group, a substituted hydrocarbon group, a hydrocarbonoxy group, an amino group, a substituted amino group, a mercapto group, a substituted mercapto group or a halogen atom, with the proviso that at least one of R1 and R2 is a ≥6C branched alkyl group or a ≥6C branched substituted alkyl group, although all R1s may be the same or different, all R2s may be the same or different, and neighboring R1 and R2 and/or neighboring two R2s may form a ring).