Disclosed is a UV sterilizer. The UV sterilizer includes a body including a top surface and a sidewall, at least one first UV LED chip disposed on the top surface of the body, and at least one second UV LED chip disposed on the sidewalls of the body. The body is freely movable among various target spaces to be sterilized, whereby the UV sterilizer can perform sterilization in a variety of spaces without being limited to a specific space.