A free-standing film comprising a cured organopolysiloxane resin obtained by conducting a cross-linking reaction between (A) an organopolysiloxane resin represented by the following average siloxane unit formula: [R1aR23-aSiO1/2]v[R3SiO3/2]w (1) or [R1aR23-aSiO1/2]x[R3SiO3/2]y[SiO4/2]z (2) (where R1 designates univalent hydrocarbon groups of one or more than one type selected from alkyl groups having 1 to 4 carbon atoms and univalent aromatic hydrocarbon groups having 6 to 8 carbon atoms; R2 designate alkenyl groups having 2 to 6 carbon atoms; R3 designates alkyl groups with 1 to 4 carbon atoms or univalent aromatic hydrocarbon groups having 6 to 8 carbon atoms; at least 50 mole % of R3 groups being phenyl groups; “a” is 0, 1, or 2; 0.8≦w