An illuminating pet harness that includes a body section defining a selectively adjustable upper torso aperture, two selectively adjustable side apertures, having a chest portion of a padded material and an inner surface and an outer surface. Also, the invention includes a first light assembly and a second light assembly that each include a clip member selectively removably coupled to the outer surface of the body section and having a lighting element electrically coupled to a battery-powered power source. The lighting element on the first lighting is disposed on a light housing pivotably coupled to the clip member of the first light assembly and the outer surface of the body section. The first lighting element is also operably configured to be oriented with respect to the second lighting element to emit light at a substantially perpendicular angle θ therefrom.