To embody a comb-shaped dividing system for light signals which is inexpensive, is free from crosstalks and is hardly affected by a temp. fluctuation.

This comb-shaped dividing system has at least two stages of continuous WDMs connected to each other. The WDMs of the first stage are interconnected to light paths. The light paths are, for example, optical fibers, waveguides or other light signal carriers and transmit the multichannel light signals having various wavelengths in plural channels. The first stage WDMs communicate the bands of the channels to the respective WDMs of the second stage through the suitable light paths. The respective bands have the plural channels separated by at least one separate channels. The respective second stage WDMs are allocated to the specific bands and are interconnected to the light paths. The respective light paths transmit ≥1 channels. The pass band of the first stage WDMs is narrower than the pass band of the second stage WDMs.