PURPOSE: To obtain a textile material capable of converting sunlight energy accumulated as chemical energy into thermal energy even when the sun is shining or not and imparting heat reserving properties.

CONSTITUTION: The objective textile material for absorbing and accumulating sunlight capable of absorbing the sunlight energy and storing the thermal energy is obtained by including a norbornadiene derivative (hereinafter abbreviated to an NBD derivative) and a catalyst in a textile material and a method for producing the textile material according to the following method is provided: That is, the method for producing the textile material is to seal the NBD derivative and the catalyst in a microcapsule and mix the microcapsule in a resin binder or directly mix the NBD derivative and catalyst in the resin binder and store the thermal energy or sandwich a mixture of the NBD derivative with the catalyst between resin films and laminate the sandwich to the textile material or mix the mixture of the NBD derivative with the catalyst in a core part of synthetic fiber having a core-sheath structure or a hollow part of hollow fiber.