The invention concerns sugar-free syrup of low calories and a method of producing the same, which syrup is of low calories and is a healthy substitute of sugar because it has almost no calories but contains a lot of edible fiber. To this end, the sugar-free syrup of low calories according to one aspect of the invention is characterized in that it consists of 100 parts by weight of water-soluble edible fiber, 100 to 200 parts by weight of water, 0.2 to 2 parts by weight of gum, 0.2 to 2 parts by weight of natural stabilizer and a proper amount of sweetener. Also, a method of producing the sugar-free syrup of low calories according to another aspect of the invention is characterized in that it comprises the steps of adding 100 to 200 parts by weight of water to 100 parts by weight of water-soluble, edible fiber and then dissolving the mixture at 50° C. to 80° C. while agitating it, adding 0.2 to 2 parts by weight of gum when the water-soluble fiber is fully dissolved, and then dissolving the mixture while agitating it, adding 0.2 to 2 parts by weight of natural stabilizer when the gum is fully dissolved, and dissolving the mixture while agitating it, adding a proper amount of sweetener to the mixture and dissolving the resulting mixture, and then cooling it by placing the mixture at a room temperature.