Silica fume is a by product resulting from the reduction of high purity quartz with coal or coke and wood chips in an electric arc furnace during the production of silicon metal or silicon alloys. Silica fume is known to improve both the mechanical and durability properties of concrete. The use of silica fume in concrete has engineering potential and economic advantage. Metakaolin is also one of the pozzolanic materials which is manufactured from selected kaolins, after refinement and calcination under specific conditions. Metakaolin, a non conventional material can be utilized beneficially in the construction industry. This paper presents the results of an experimental investigations carried out to find the suitability of silica fume and metakaolin in production of concrete. It is observed that the optimum doses of silica fume and metakaolin are 5% and 15% (by weight) respectively, when used as part replacement of ordinary Portland cement (OPC). The silica fume inclusion increases both the workability and compressive strength of concrete considerably. Metakaolin inclusion also leads to substantial increase in the compressive strength; however, the workability is slightly compromised.