Cellulase activators and lignocellulosic biomass saccharification method using the same

The present invention, in order to utilize the energy of the plant biomass efficiently and effectively suppress the environmental impact, plant biomass, particularly lignocellulosic biomass in small steps, efficiently and saccharified at a low cost technology to develop, it is to provide. Cellulase activators as an active ingredient lignocellulolytic cofactors such as comprising the amino acid sequence shown in SEQ ID NO: 1, and a method of saccharifying lignocellulosic biomass using it.