A melt-blown nonwoven fabric manufacturing method comprising: a resin discharging step of discharging a molten resin from a spinning die head provided with a nozzle having a plurality of holes; a fiberization step of forming fibers by blowing hot gas toward the holes of the nozzle, and thus making the discharged molten resin into fibers, the hot gas flowing from the holes of the nozzle toward a conveyor opposed to the spinning die head; and a nonwoven fabric formation step of forming a melt-blown nonwoven fabric by depositing the fibers on the conveyor using a flow of the hot gas, wherein calendering is not performed after the nonwoven fabric formation step, the hot gas has a temperature greater than or equal to a melting point of the resin and less than or equal to the melting point + 100°C, the hot gas has a flow rate of greater than or equal to 1000 NL/min/m and less than or equal to 7000 NL/min/m, the resin is discharged through each of the holes of the nozzle at a discharging rate of greater than or equal to 0.006 cm 3 /min and less than or equal to 0.3 cm 3 /min, the resin has, at the holes of the nozzle, a temperature greater than or equal to the melting point of the resin and less than or equal to the melting point + 100°C, a minimum distance between the conveyor and the holes of the nozzle is greater than or equal to 10 mm and less than or equal to 75 mm, and an atmosphere between the conveyor and the holes of the nozzle has a temperature of greater than or equal to 110°C and less than or equal to 160°C, wherein the temperature of the atmosphere between the conveyor and the holes of the nozzle is measured through thermography at a location two meters away from a front surface of the spinning die head, the front surface being a surface parallel to the width direction of the melt-blown nonwoven fabric. a resin discharging step of discharging a molten resin from a spinning die head provided with a nozzle having a plurality of holes; a fiberization step of forming fibers by blowing hot gas toward the holes of the nozzle, and thus making the discharged molten resin into fibers, the hot gas flowing from the holes of the nozzle toward a conveyor opposed to the spinning die head; and a nonwoven fabric formation step of forming a melt-blown nonwoven fabric by depositing the fibers on the conveyor using a flow of the hot gas, wherein calendering is not performed after the nonwoven fabric formation step, the hot gas has a temperature greater than or equal to a melting point of the resin and less than or equal to the melting point + 100°C, the hot gas has a flow rate of greater than or equal to 1000 NL/min/m and less than or equal to 7000 NL/min/m, the resin is discharged through each of the holes of the nozzle at a discharging rate of greater than or equal to 0.006 cm 3 /min and less than or equal to 0.3 cm 3 /min, the resin has, at the holes of the nozzle, a temperature greater than or equal to the melting point of the resin and less than or equal to the melting point + 100°C, a minimum distance between the conveyor and the holes of the nozzle is greater than or equal to 10 mm and less than or equal to 75 mm, and an atmosphere between the conveyor and the holes of the nozzle has a temperature of greater than or equal to 110°C and less than or equal to 160°C, wherein the temperature of the atmosphere between the conveyor and the holes of the nozzle is measured through thermography at a location two meters away from a front surface of the spinning die head, the front surface being a surface parallel to the width direction of the melt-blown nonwoven fabric.