Using the twin-roller type melt-quenching technique, we investigated the effect of Cr content on the microstructure and tensile properties of ferritic stainless steels, whose thickness is 0.5㎜ has been investigated. In this experiment, the three kinds of ferritic stainless steels has been used. The predicted cooling rates of melt-quenched ferritic stainless steels were not changed, even the Cr content increases up, to 25%. The metastable phase of the melt-quenched ferritic stainless steels were changed depending upon the car Cr content. In case of 17% Cr steel, the metastable phase was martensite and in case of 20 and 25% Cr steel, the metastable phase was austenite. After heat treatment, the tensile properties of the melt-quenched stainless steels are better than those of conventional ferritic stainless steels.