PROBLEM TO BE SOLVED: To provide an ideal biodegradable filament nonwoven fabric effective for improving the mechanical properties such as the softness of the fiber without excessively deteriorating the crystallinity and heat-resistance, substantially keeping the quality during use, quickly decomposable even in natural environment by the disposal after use, useful as a fertilizer actively supplying the nutrients to the soil and producible at a low cost. SOLUTION: The bio-degradable filament nonwoven fabric is composed of a filament consisting of a biodegradable polymer having a melting point of >=100 deg.C and at least containing a nutrient salt agent.
