The inventive hollow blade of a ship propeller comprises a top (4), a blade root (1), the walls of leading and exit edges which walls are interconnected by a plating (5) and form respectively the pressure and suction helicoidal surfaces and the blade outline, and an inner framework, wherein the hollow blade is scimitar-shaped and is cast-welded, the inner framework consists of a longitudinal load-bearing bar (6) and transversal load-bearing elements (7), the longitudinal load-bearing bar (6) is radially arranged in the cavities (8, 9) of the hollow blade along the length and the outline thereof, coinciding with the greatest thicknesses of the blade cross-sectional profile, and is welded to the blade top (4) by one end and to the blade root (1) by the other end, the transversal load-bearing elements (7) are disposed along the cylindric generators, the ends thereof are welded to the wall (2) of the leading edge and to the wall (3) of the exit edge, respectively, and the middle part thereof is connected to the longitudinal load-bearing bar (6). Furthermore, the mass of the leading edge is increased as much as possible and the mass of the exit edge is reduced as less as possible, on the blade segment extending from the blade span size which is equal to 0.5 of the propeller radius up to the blade root (1).