A liquid dispenser provided at a sink and comprising: an cylinder body coupled to the sink to extend vertically and having a rotation limit hole; a first liquid discharge nozzle coupled to an upper region of the cylinder body to extend horizontally, the first liquid discharge nozzle being configured to supply at least one of a purified liquid, a heated liquid, or a cooled liquid; and a second liquid discharge nozzle coupled to the cylinder body to extend horizontally, the second liquid discharge nozzle being positioned to be spaced downward from the first liquid discharge nozzle to supply a sterilizing liquid, wherein an extending length of the first liquid discharge nozzle is greater than an extending length of the second liquid discharge nozzle and/or the first liquid discharge nozzle and the second liquid discharge nozzle rotate independently with respect to the cylinder body, wherein the first liquid discharge nozzle has one side rotatably coupled to an upper end of the cylinder body to extend horizontally, and the second liquid discharge nozzle has one side coupled to the cylinder body to extend horizontally, characterized in that the first liquid discharge nozzle includes: a first stopper, an insertion extension, and a lower frame, wherein the first stopper protruding into an inner hollow of the insertion extension is positioned on a rear end of the lower frame defining a bottom surface, a first connection member having a ring shape and being coupled to an upper end of the cylinder body, a pair of rotation limit protrusions, wherein when the first liquid discharge nozzle rotates, the first stopper is hooked by the pair of rotation limit protrusions so that the rotation range of the first liquid discharge nozzle is limited, wherein the second liquid discharge nozzle includes: a lower frame defining a bottom surface of the second liquid discharge nozzle, a second stopper positioned on a rear end of the lower frame of the second liquid discharge nozzle and inserted into a rotation limit hole. an cylinder body coupled to the sink to extend vertically and having a rotation limit hole; a first liquid discharge nozzle coupled to an upper region of the cylinder body to extend horizontally, the first liquid discharge nozzle being configured to supply at least one of a purified liquid, a heated liquid, or a cooled liquid; and a second liquid discharge nozzle coupled to the cylinder body to extend horizontally, the second liquid discharge nozzle being positioned to be spaced downward from the first liquid discharge nozzle to supply a sterilizing liquid, wherein an extending length of the first liquid discharge nozzle is greater than an extending length of the second liquid discharge nozzle and/or the first liquid discharge nozzle and the second liquid discharge nozzle rotate independently with respect to the cylinder body, wherein the first liquid discharge nozzle has one side rotatably coupled to an upper end of the cylinder body to extend horizontally, and the second liquid discharge nozzle has one side coupled to the cylinder body to extend horizontally, characterized in that the first liquid discharge nozzle includes: a first stopper, an insertion extension, and a lower frame, wherein the first stopper protruding into an inner hollow of the insertion extension is positioned on a rear end of the lower frame defining a bottom surface, a first connection member having a ring shape and being coupled to an upper end of the cylinder body, a pair of rotation limit protrusions, wherein when the first liquid discharge nozzle rotates, the first stopper is hooked by the pair of rotation limit protrusions so that the rotation range of the first liquid discharge nozzle is limited, wherein the second liquid discharge nozzle includes: a lower frame defining a bottom surface of the second liquid discharge nozzle, a second stopper positioned on a rear end of the lower frame of the second liquid discharge nozzle and inserted into a rotation limit hole. a first stopper, an insertion extension, and a lower frame, wherein the first stopper protruding into an inner hollow of the insertion extension is positioned on a rear end of the lower frame defining a bottom surface, a first connection member having a ring shape and being coupled to an upper end of the cylinder body, a pair of rotation limit protrusions, wherein when the first liquid discharge nozzle rotates, the first stopper is hooked by the pair of rotation limit protrusions so that the rotation range of the first liquid discharge nozzle is limited, wherein the second liquid discharge nozzle includes: a lower frame defining a bottom surface of the second liquid discharge nozzle, a second stopper positioned on a rear end of the lower frame of the second liquid discharge nozzle and inserted into a rotation limit hole. a lower frame defining a bottom surface of the second liquid discharge nozzle, a second stopper positioned on a rear end of the lower frame of the second liquid discharge nozzle and inserted into a rotation limit hole.