A trisadamantane compound which is useful as a photoresist additive, intermediate for medicines/agricultural chemicals, and resin additive (heat−resistance improver). General Formula (I) (I) [In the formula, R<sp>1</sp> and R<sp>2</sp> each represents C<sb>1−8</sb> alkyl; and X<sp>1</sp> and X<sp>2</sp> each represents hydrogen, halogeno, C<sb>1−8</sb> alkyl, hydroxy, C<sb>1−8</sb> alkoxy, carboxyl, or COOR<sp>3</sp> (R<sp>3</sp> is C<sb>1−8</sb> alkyl).]
