This paper reports development characteristics of strength and microstructure of RPC (reactive powder concrete) containing meta-kaolin, in order to use meta-kaolin as the substitutive material of silica fume, which is so expensive in Korea. Various RPC containing meta-kaolin were made by replacement ratio of meta-kaolin and different curing conditions, and their mechanical properties, hydration products and pore structures were investigated. The result has shown possibility of meta-kaolin as a substitutive materials of silica fume in RPC. It was also shown use of meta-kaolin is invaluable for increase of strength at very early age (1 day), and expecially for the improvement of flexural strength than compressive strength. The effect of strength improvement in RPC containing meta-kaolin could be explained based on the analysis of hydration products and pore structure of them by XRD, SEM and MIP(mercury intrusion porosimetry) technique.