Abstract: A process for preparing a low-viscous pasta sauce contained in a container, comprising using 10 to 65% by weight of the water to be used in the formulation of a pasta sauce, 0.5 to 5.5% by weight of a waxy starch, and, if necessary, 0.5 to 3% by weight of wheat starch, based on the total weight of the pasta sauce immediately before being loaded into a container, together with other raw materials for the pasta sauce to prepare a condensed pasta sauce having a viscosity of 1,000 to 20,000 cp at 70.degree. to 90.degree. C., loading the condensed pasta sauce into the container, and loading the remaining water into the container after, simultaneously with, or before the loading of the condensed pasta sauce into the container, followed by a sterilization treatment by heating to make a pasta sauce having a viscosity of 500 cp or less at normal temperatures (25.degree. C.).