The solubilities of flavone and 3-hydroxyflavone in supercritical carbon dioxide (SC-CO2) were measured at 308.2 K and 318.2 K over the pressure range from 9.1 MPa to 25.3 MPa by a flow type apparatus, which can detect the concentrations of the solutes in a supercritical fluid. The solubilities were determined from the mass of solute trapped by decompressing and the volume of CO2. Solubility data were correlated by a solution model based on the regular solution model.