Provided are a transparent light guide plate able to emit light through opposing surfaces and allowing for adjustment of the ratio between intensities of light exiting through the opposing surfaces, and a lighting device including the same. In the transparent light guide plate, a transparent base has a first surface with a light-scattering layer disposed thereon. The light-scattering layer includes a matrix layered on the first surface and a number of light-scattering particles dispersed in the matrix. A dot pattern is disposed on the light-scattering layer with some formed from a light-absorbing material and some formed from a light-reflective material.