The present invention relates to a beam homogenizer comprising a zooming mechanism, and the present invention comprises: a first array lens which is fixedly disposed on an optical axis along which a laser is output and on which microlenses with a predetermined shape are arranged at regular intervals on a plate-shaped base; a second array lens which is spaced apart from the first array lens, disposed on the same optical axis, and movably disposed along the optical axis, and on which microlenses with a predetermined shape are arranged at regular intervals on the plate-shaped base; a third array lens which is spaced apart from the second array lens, disposed on the same optical axis, and movably disposed along the optical axis, and on which microlenses with a predetermined shape are arranged at regular intervals on the plate-shaped base; and a condensing lens which is spaced apart from the third array lens, is fixedly disposed on the same optical axis, and condenses the received laser light.
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