To provide a reinforcing sheet for light industrial products having necessary hardness and stiffness and highly balanced light-weight and smoothness.

The reinforcing sheet for light industrial products is produced by mixing (A) a synthetic fiber and (B) a colored fiber having same fiber diameters to attain a desired color, producing a nonwoven fabric by mixing the fibers A and B with (C) a low-melting fiber composed of a single fiber component and having a fiber diameter thinner than those of the fibers A and B at a specific mixing ratio and welding the fibers by heating and pressing the nonwoven fabric.