To investigate the effect of austenitizing tempratures on the mechanical properties and corrosion resistance of 0.19%C-13.6%Cr martensitic stainless steel, the changes in martensitic trasformation temperatures, mechanical properties and anodic polarization curve were examined after changing the sustenitizing temperatures and tempering temperatures. On increasing heating rate at the same austenitizing temperatures, A_s, A_r and M_s increased. And the M_s temperature showed to be decreased with increasing austenitizing temperature. With increasing tempering temperature up to 500℃, strength, hardness and impact value were not changed remarkably, on the other hand the tensile strength and hardness decreased and impact value increased after tempering above 550℃ owing to the M_(23)C_6 carbide precipitation. The abrupt decrease in elongation at the tempering temperture of 500℃ proved to the precipitation of M_7C₃carbide. The effect of austenitizing temperature on the mechanical properties of the tempered specimen showed to be decreased in impact value and elongation at the austenitizing temperature of 1150℃. At low tempering temperatures the corrosion resistance of the tempered specimen was not changed obviously with increasing tempering temperature. On the other hand, the resistance decreased above the tempering temperature of 600℃ due to the precipitation of M_(23)C_6 carbides. The corrosion resistance showed to be improved with increasing the austenitizing temperature owing to the dissolution of carbides.