A composite chromium plating film comprising a hard chromium plating film having crack-like grooves filled with hard particles, wherein the hard particles are selected from alumina particles, silicon carbide particles, silicon nitride particles and diamond particles with an irregular particle shape and an average equivalent circle diameter of 6.0 μm or less, or a mixture thereof, charactherized in that the hard particles have powder characteristics of an average circularity of 0.70 to 0.85, and an aspect ratio of 1.3 or more, wherein the powder characteristics are determined by using a particle shape image analyzer PITA-1 made by SEISHIN ENTERPRISE Co., Ltd. as follows: - dispersing 0.1 g of hard particles in silicone oil as the dispersion medium under the conditions of a carrier fluid 1 flow rate of 10 μl/sec, a carrier fluid 2 flow rate of 10 μl/sec and a sample fluid flow rate of 0.08 μl/sec, - allowing the fluids to pass through a cell, - carrying out binarization with the first binarization threshold for determining particles to be taken being 80 and the first binarization threshold for determining the outline of particles that have been taken being 200, - taking projections of 3000 dispersed hard particles by a monochrome CCD camera provided with a 10 power objective lens, and - calculating the values based on the 3000 projections taken as follows: • Circularity = circumference of a circle having the same area as that of a particle in a projection / circumference of a particle in a projection • Average circularity: an average of circularity of 3000 particles • Equivalent circle diameter: diameter of a circle having the same area as that of a particle in a projection • Average equivalent circle diameter: an average of equivalent circle diameters of 3000 particles • Aspect ratio = maximum length / maximum vertical length. - dispersing 0.1 g of hard particles in silicone oil as the dispersion medium under the conditions of a carrier fluid 1 flow rate of 10 μl/sec, a carrier fluid 2 flow rate of 10 μl/sec and a sample fluid flow rate of 0.08 μl/sec, - allowing the fluids to pass through a cell, - carrying out binarization with the first binarization threshold for determining particles to be taken being 80 and the first binarization threshold for determining the outline of particles that have been taken being 200, - taking projections of 3000 dispersed hard particles by a monochrome CCD camera provided with a 10 power objective lens, and - calculating the values based on the 3000 projections taken as follows: • Circularity = circumference of a circle having the same area as that of a particle in a projection / circumference of a particle in a projection • Average circularity: an average of circularity of 3000 particles • Equivalent circle diameter: diameter of a circle having the same area as that of a particle in a projection • Average equivalent circle diameter: an average of equivalent circle diameters of 3000 particles • Aspect ratio = maximum length / maximum vertical length. • Circularity = circumference of a circle having the same area as that of a particle in a projection / circumference of a particle in a projection • Average circularity: an average of circularity of 3000 particles • Equivalent circle diameter: diameter of a circle having the same area as that of a particle in a projection • Average equivalent circle diameter: an average of equivalent circle diameters of 3000 particles • Aspect ratio = maximum length / maximum vertical length.