This paper is focused on flexural bahavior of cement composites reinforced with carbon fibers as a part of research for improving a seismic performance of structures using carbon fiber reinforced concrete(CRFC). Flexural behavior test was conducted on respective specimens reinforced with different fiber length(6mm, 12mm) and contents(0%, 0.5%, 1.0%, 2.0%, 3.0%). The result of the test showed that the flexural performance of carbon fiber reinforced cement composites are directly proportional to the fiber contents except for the specimen reinforced with 3% carbon fiber.