A die for melt-blowing apparatus, which has a die body, a nozzle piece, and a lip plate. The nozzle piece is divided into plural temperature-controlling regions in a direction crosswise to a spinning direction. A temperature sensor is used to measure the temperature at a portion surrounding a nozzle orifice in the nozzle piece in each of the divided temperature-controlling regions. A heated gas is applied directly to the nozzle piece for controlling the temperature of the portion surrounding the nozzle orifice to a predetermined temperature. Using this die body, a melt-blown non-woven fabric with a uniform distribution of the weight per unit area can be easily obtained.