[Object] To provide fine particles 2 having excellent printing characteristics, thermal conductivity, and electrical conductivity.[Solution] The fine particles 2 are flake-like. A main component of the fine particles 2 is an electrically conductive metal. A representative metal is silver. The structure of this metal is monocrystalline. An arithmetical mean roughness Ra of the surface of the fine particles 2 is not larger than 10 nm. The fine particles 2, a solvent, a binder, and a dispersant, etc., are mixed to obtain an electrically conductive paste. By using the electrically conductive paste, a pattern connecting elements is printed on a printed circuit board of an electronic device.