Abstract—Engineered Cementitious Composite (ECC) is a class of high-performance cementitious composites with strain-hardening behaviour and excellent crack control. Substitution of concrete with ECC can avoid the cracking and durability problems associated with brittleness of concrete.Extensive inelastic deformation is achieved in ECC through Recron 3's fibre. ECC can be us due to their appearance, high bearing capacity, ductility, fast construction and cost effective. The aim of the paper is to study the flexural behaviour of ECC and concrete composite reinforced beams. Size of the beam is 1200 mm x 100 mm x 150 mm. The percentage of Recron 3'2.5% by weight of cement. Finally conventional beam is compared with ECC beam and also compare ECC at top and bottom of composite beams.