The aforementioned R2 is preferably a dimethylene group. [0009] The organopolysiloxane represented by the aforementioned general formula (1) or (2) can be produced via a step of hydrolyzing an organosilicon compound represented by the following structural formula: wherein R1 and R2 are the same as defined above; and X is a chlorine atom, a hydroxyl group or an alkoxy group having 1 to 3 carbon ato