We study a Chandra X-ray Observatory ACIS-S observation of the Galactic globular cluster M12. With a 26 ks exposure time, we detect 6 X-ray sources inside the half-mass radius (2.16 arcminutes) of which two are inside the core radius (0.72 arcminutes) of the cluster. If we assume these sources are all associated the globular cluster M12, the luminosity Lx among these sources between 0.3-7.0 keV varies roughly from 10E+30 to 10E+32 ergs s^−1. For identification, we also analyzed the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) data and identified the optical counterparts to five X-ray sources inside the HST field of view. According to the X-ray and optical features, we found 2-5 candidate active binaries (ABs) or cataclysmic variables (CVs) and 0-3 background galaxies within the HST ACS field of view. Based on the assumption that the number of X-ray sources scales with the encounter rate and the mass of the globular cluster, we expect 2 X-ray source inside M12, and the expectation is consistent with our observational results. From the expectation, the number of X-ray sources in M12 is dominated by the mass term which is the indication of primordial origin of the X-ray sources in globular clusters. Therefore, the existence of identified X-ray sources (possible CVs or ABs) in M12 suggests the primordial origin of X-ray sources in globular clusters which is in agreement with previous studies.