while ensuring the lighting of the room, hot wire to capture the high amount of solar radiation time zone It reduces, and in addition to the time zone is to provide a heat ray control sheet to incorporate properly the hot wire. A plurality of heat ray transmitting portions and a plurality of heat absorbing portions, and a hot-wire control sheet, wherein a plurality of heat absorbing portion and a heat ray transmitting portion, so that heat-absorbing portion becomes a predetermined pitch Pa, and are arranged alternately in one direction parallel to the sheet surface, in a cross section perpendicular to the parallel sheet surface in the one direction, the cross-sectional shape of the plurality of heat absorbing portion has a width Wa in the width direction, thickness a height Ta direction, satisfies the following formula (1) and (2), the heat ray control sheet. Equation (1): Ta / (Pa-Wa) tan (90- x) [where, x in the formula, in the case of na a refractive index of air, the refractive index of the heat ray transmitting portion was nc, x = It is assumed that it is guided by sin-1 ((na / nc) sin84). ] Equation (2): Ta / Pa
