We have carried out the study of magnetocaloric effect for as-quenched and annealed Fe_91-sY_sZr₉ alloys. Samples were prepared by arc melting the high-purity elemental constituents under argon gas atmosphere and by single roller melt spinning. These alloys were annealed one hour at 773 K in vacuum chamber. The magnetization behaviours of the samples were measured by vibrating sample magnetometer. The Curie temperature increases with increasing Y concentration (x=0 to 8). Temperature dependence of the entropy variation was found to appear in the vicinity of the Curie temperature. The results show that annealed Fe₈₆Y₅Zr₉ and Fe₈₃Y₈Zr₉ alloys a bigger magnetocaloric effect than that those in as-quenched alloys. The value is 1.23 J/kg K for annealed Fe₈₆Y₅Zr₉ alloy and 0.89 J/kg K for as-quenched alloy, respectively. In addition, the values of ΔS_M for Fe₈₃Y₈Zr₉ alloy is 0.72 J/Kg K for as-quenched and 1.09 J/Kg K for annealed alloy, respectively.