The pharmaceutical characteristics of solid indoprofen inclusion complex such as dissolution, permeation through a cellophane membrane, model analysis of interfacial transfer, absorption behaviors in rat intestine, and the plasma concentration of indoprofen after oral administrations to rabbits were examined in comparison with those indoprofen alone. The inclusion complex obtained by freeze-drying method showed the higher dissolution rate and membrane permeability among the test powders, and increased significantly the amount of indoprofen absorbed in rat intestine and the levels of plasma concentration of indoprofen after oral administrations to rabbits. The increase of bioavailability of indoprofen-β-cyclodextrin complex was considered due to the increased solubility and dissolution rate of solid powder form.