Thermally conductive sheet, led led module mounting substrate, and

The present invention provides an excellent heat dissipating characteristic, the thermally conductive filler is dispersed in the polymer matrix in a thermally conductive sheet. The present invention relates to a thermally conductive sheet, which is dispersed in the polymer matrix of the non-spherical thermally conductive filler of the thermally conductive sheet, a portion of the thermally conductive filler is oriented in the thickness direction of the sheet at least in the thermally conductive filler when the maximum degree of orientation of the portion in the thickness direction of the sheet as the center alignment, the alignment axis through the center of the sheet surface and perpendicular to the alignment of a central axis, having the heat conductive filler orientation towards the central axis of the bit oriented and toward the peripheral portion of the sheet from the thermally conductive filler is oriented in the orientation of the center of the thickness direction of the sheet portion is reduced.