Abstract: To obtain a thermal-conductive polyimide film having excellent mechanical characteristics, heat resistance, and the like, and additionally being excellent in thermal conductivity in the planar direction, having anisotropy in thermal conductivity between the planar direction and the thickness direction, and being excellent also in tear strength and moldability. A highly thermal-conductive polyimide film, containing 5 weight % to less than 40 weight % scaly graphite powder relative to the entirety of the polyimide film, having a thermal conductivity in a planar direction of 1.0 W/m·K or higher and a thermal conductivity in a thickness direction of less than 1.0 W/m·K, and having a ratio of the thermal conductivity in the planar direction over the thermal conductivity in the thickness direction of 4.0 or higher.