The same reaction and after-treatment as in the production of a fluorine-containing organosilicon compound in Example 14 were conducted to obtain 324.7 g of a pale yellowish, transparent liquid compound, except that 276.2 g of the compound having the formula (18) was replaced with 320.2 g of a compound represented by the following formula (25): ##STR68## wherein Rf is a group represented by the fo