The present invention relates to a metal inert gas (MIG)-welded bead inspection apparatus to remarkably increase inspection efficiency and yield. According to the present invention, the MIG welded bead inspection apparatus comprises: a frame body including vertical and horizontal frames; a power supplying means; a bracket; a laser irradiation module irradiating a line laser crossing a welded bead on an object to be welded disposed on an inspection position; a camera module extracting a line profile of the line laser irradiated to the object to be welded from a captured image; and a control unit analyzing the extracted line profile to determine whether the welded bead is welded well.
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