A faucet device includes a fixing unit having a water supply hole and a locking groove, a valve unit coupled separably to the fixing unit, a positioning unit, and a locking unit. The valve unit is movable between a first position to be connected to the fixing unit, and a second position to be separated from the fixing unit. The valve unit is rotatable relative to the fixing unit so as to be secured to the fixing unit by the positioning unit and to unblock the water supply hole, and is further rotatable reversely so as to be separable from the fixing unit and to block the water supply hole. The locking unit includes a locking component that is biased resiliently to engage the locking groove, and that is moved by the valve unit to be disengaged from the locking groove during movement of the valve unit from the second position to the first position.