PURPOSE: An ultra violet sterilizer for water purification is provided to facilitate maintenance and repair thereof and to improve sterilization by improving exposure of water to ultraviolet ray. CONSTITUTION: An ultra violet sterilizer for water purification comprises: a housing(110) having a receiving space; a flow path formation unit(130) arranged in the receiving space in order to divide the receiving space into a plurality of flow path stages; and a plurality of UV LEDs(140) combined with the housing in order to ultraviolet ray to water moving along a plurality of flow path stages.
