Diffuse hard X-ray emission from the Galactic ridge.

We re-analyze Ginga scanning observation data and present hard X-ray spectra and the distribution along the Galactic ridge. The spectra exhibit a hard component much in excess of single temperature thermal bremsstrahlung with kT=5~10keV, and the intensity is consistent with a power-law extension from the gamma-ray measurements. This result suggests that there is continuous emission over keV ~ GeV range from an extended region in the Galactic ridge. This implies that freshly accelerated electrons are responsible for the emission.