Provided is a spunbond nonwoven fabric for use in filters which has excellent rigidity, folding endurance, and uniformity of a weight per unit area, and which also has excellent dust collection performance and mechanical properties. The spunbond nonwoven fabric for use in filters includes a thermoplastic continuous filament and has a partially fused portion. The nonwoven fabric has a stiffness of 2 mN or more and 100 mN or less, a weight per unit area-CV value of 5% or less, and a weight per unit area of 150 g/m2 or more and 300 g/m2 or less.