Locking device for silicone packings of household bean milk and bean curd makers, that firmly attaches a silicone packing in a predetermined position in a bean milk and bean curd maker, thus preventing the silicone packing from being undesirably dislodged from its predetermined position in the maker. Loss of the silicone packing is thus prevented. The silicone packing is attached to an underside of the main body so as to prevent leakage of water into the main body and to absorb shock. The locking device for the silicone packing includes protrusions on an upper surface of the silicone packing, and locking depressions on a lower portion of the main body corresponding to the protrusions, so that the protrusions are inserted into and engages with the corresponding locking depressions, in use.