An objective of the present invention is to provide a dental alginate impression material composition capable of solving a problem that the permeation rate of water with respect to the whole powder of an alginate impression material is slow at the time of using the material, so that a kneading time is long and a sufficient operational time cannot be secured, and a problem that a kneaded material drops to the back of a throat due to aging of the material at the time of taking an impression. The dental alginate impression material composition comprises 0.001 to 1% by weight of one or more kinds selected from oils mainly consisting of a fatty acid and an ester of alcohol, waxes mainly consisting of a fatty acid and an ester of glycerin, and a fatty acid ester； 0.01 to 10% by weight of a surfactant； and 0.01 to 10% by weight of one or more kinds of specific polysaccharides.
