This paper shows evidence that the innovative SMEs use more internal finance to fund R&D investment in the existence of the asymmetric information. The innovative SMEs also use more internal finance to fund asset-counted R&D investment than the cost-counted R&D investment, because the intangible assets created by asset-counted R&D investment may act as an innovative driver that has a greater multiplier effect on the firm value. Moreover, the innovative SMEs use more internal finance to smooth R&D investment in the existence of the external financial constraints. These findings suggest a new policy implication into how internal finance can be particularly valuable for the R&D smoothing of the innovative SMEs; that is, internal finance is an important aspect of innovation policy for the innovative SMEs.
Keywords : internal finance, R&D investment, asymmetric information, financial constraints

