PURPOSE: To obtain the high strength martensitic stainless steel sheet having excellent fatigue resistance by specifying a compsn. constituted of C, Si, Mn, Cr, Ni, Mo, V, Nb, Al, N and Fe and regulating non-metallic inclusions therein.

CONSTITUTION: The high strength martensitic stainless rolled steel sheet has a chemical compsn. contg., by weight, ≤0.05% C, ≤ 1.0% Si, ≤ 2.0% Mn, 12 to 17% Cr, 1.5 to 6.5% Ni and 0.2 to 2.0% Mo, contg. one or 2 kinds of 0.01 to 0.50% V and 0.01 to 0.50% Nb, furthermore contg. total ≤0.05% of 0.005 to 0.025% Al and ≤0.01% N, moreover contg., at need, 0.2 to 5.0% Cu and the balance Fe with inevitable impurities and has a structure of which non-metallic inclusions are dispersed into a steel at ≤0.01% areal occupying rate. The steel sheet has excellent fatigue resistance in a corrosive and erosive environment and is suitable for structural members used in a high speed water current such as sea water or the like.