In order to understand the characteristics of fine particles emitted from coal-fired power plant stacks, it is important to analyze the size distribution and components of particles. In this study, particle size distributions were measured using the ejector-porous tube dilution device and an ELPI system at a stack in a coal-fired power plant. Main elemental components of particles in each size interval were also identified through TEM-EDS analysis for the particles collected in each ELPI stage. Particle size distributions based on number and mass were analyzed with component distributions from 0.006 to 10 μm. The highest number concentration was about 0.01 μm. The main component of the particles consisted of sulfur, which indicated that sulfate aerosols were generated by gas-to-particle conversion of SO2. In a mass size distribution, a mono-modal distribution with a mode diameter of about 2 μm was shown. For the components of PM1.0 (particles less than 1 μm), the abundance order was F > Mg > S > Ca, and however, for the components of PM10 (particles less than 10 μm), it was in the order of Fe > S > Ca > Mg. The elemental components by particle size were confirmed.