The present invention provides a martensitic stainless steel sheet which is hard to be softened by tempering caused by heating during the use of a disk brake, can maintain the predetermined hardness, and has excellent punching workability, bending workability before quenching, and a particularly small shear drop, and in which a predetermined hardness after quenching is constantly achieved, in a low carbon martensitic stainless steel sheet used only after quenching. Specifically, the sheet contains, on the basis of mass percent, 0.030% to 0.100% C; 0.50% or less of Si; 1.00% to 2.50% Mn; more than 10.00% to 15.00% Cr; at least one selected from the group consisting-of 0.01% to 0.50% Ti, 0.01% to 0.50% V, 0.01% to 1.00% Nb, and 0.01% to 1.00% Zr; N in an amount defined by the following expression, N: 0.005% to (Ti+V)x{fraction (14/50+(Nb+Zr)x{fraction (14/90; and the balance being Fe and incidental impurities. The sheet further contains, on the basis of mass percent, more than 0.040% to0.100% C+N and 0.02% to 0.50% in total of at least one selected from the group consisting of 0.01% to 0.50% V, 0.01% to 0.50% Nb, 0.01% to 0.50% Ti, 0.01% to 0.50% Zr, 0.50% or less of Ta, and 0.50% or less of Hf, and further contains Mo, B, Co, W, Ca, and Mg according to needs. The martensitic stainless steel having the above composition is formed into a hot-rolled steel sheet having an HRB hardness of 85 to 100 after annealing in the range of 550 DEG C. to 750 DEG C.