To provide expansive concrete which contains only a small amount of an expansive admixture and is capable of exhibiting sufficient expansion.

This expansive concrete comprises an expansive admixture and ecological cement utilizing waste as a raw material, wherein the ecological cement contains: 10-25 mass % C3A(3CaO.Al2O3), 10-20 mass % C4AF(4CaO.Al2O3.Fe2O3), a 20-35 mass % total amount of C3A and C4AF, ≤0.1 mass % chlorine, and also gypsum and at least one of C3S(3CaO.SiO2) and C2S(2CaO.SiO2).