An electrically-heated window sheet material comprising: a heatable transparent conductive film; and a plurality of bus bars (13, 14) for supplying electricity to the transparent conductive film; wherein the plurality of bus bars include a left bus bar connected to a left edge of the transparent conductive film, and a right bus bar connected to a right edge of the transparent conductive film; wherein the transparent conductive film includes a band-shaped first region interposed between the left bus bar and the right bus bar, a band-shaped second region interposed between the left bus bar and the right bus bar, and a plurality of openings (31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133) provided in the first region; wherein a distance between the left bus bar and the right bus bar is shorter in the first region than in the second region; and wherein the plurality of openings (31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133) are arranged so that a current flowing in the first region from one of the left and right bus bars (13, 14) to the other of the left and right bus bars (13, 14) is bypassed at least once by the openings(31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133), characterized in that the distance between the left and right bus bars (13, 14) gradually becomes longer from an upper to lower side of the first region, and in that the plurality of openings (31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133) include openings (31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133) having vertical dimensions that become smaller toward the lower side. a heatable transparent conductive film; and a plurality of bus bars (13, 14) for supplying electricity to the transparent conductive film; wherein the plurality of bus bars include a left bus bar connected to a left edge of the transparent conductive film, and a right bus bar connected to a right edge of the transparent conductive film; a left bus bar connected to a left edge of the transparent conductive film, and a right bus bar connected to a right edge of the transparent conductive film; wherein the transparent conductive film includes a band-shaped first region interposed between the left bus bar and the right bus bar, a band-shaped second region interposed between the left bus bar and the right bus bar, and a plurality of openings (31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133) provided in the first region; a band-shaped first region interposed between the left bus bar and the right bus bar, a band-shaped second region interposed between the left bus bar and the right bus bar, and a plurality of openings (31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133) provided in the first region; wherein a distance between the left bus bar and the right bus bar is shorter in the first region than in the second region; and wherein the plurality of openings (31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133) are arranged so that a current flowing in the first region from one of the left and right bus bars (13, 14) to the other of the left and right bus bars (13, 14) is bypassed at least once by the openings(31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133), characterized in that the distance between the left and right bus bars (13, 14) gradually becomes longer from an upper to lower side of the first region, and in that the plurality of openings (31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133) include openings (31, 32, 33, 41, 42, 43, 44, 51, 52, 53, 131, 132, 133) having vertical dimensions that become smaller toward the lower side.