An environment-friendly panel packing material is provided to minimize damage and breakage of a panel generated due to external impact by forming a double-inner side wall between the adjacent receiving spaces. An environment-friendly panel packing material is made of one corrugated cardboard and provided with plural receiving spaces(11) of the predetermined width and length divided at regular intervals. An inner side wall of the double structure is disposed between the receiving spaces adjacent to each other and formed by bending and extending a first inner side wall(12) of the predetermined width and a second inner side wall(13) of the same width of the first inner side wall, along half cut lines. Bending lines are disposed on the inside and extended from the left and right outline sections of the receiving space in the predetermined length. Side walls of the predetermined length are bent and extended from the peripheral parts of the left and right outlines of a lower panel of the predetermined length. Inner side wall inclined planes are formed at the inner sides of the first and second inner side walls and extended from the upper and lower outlines of the bending line to the half cut line.
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