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X-ray images and spectra of 5 cataloged supernova remnants (SNRs), G12.0-0.1,G346.6-0.2, G348.5+0.1, G348.7+0.3, and G355.6-0.0, observed in the ASCAgalactic plane survey are presented. The sizes of X-ray emission fromG12.0-0.1, G348.5+0.1, G348.7+0.3, and G355.6-0.0 are comparable to their radiostructures, while that of G346.6-0.2 is smaller than the radio structure. TheX-ray spectra of all of the SNRs were heavily absorbed by interstellar matterwith N_H>10^{22} cm^{-2}. The spectrum of G355.6-0.0 exhibited emission lines,indicating that the X-ray emission has a thin thermal plasma origin, and waswell represented by two-temperature thin thermal emission model. On the otherhand, no clear emission line features were found in the spectra of the othersand the spectra could be represented by either a thin thermal emission model ora power-law model.

X-Ray Emission from Supernova Remnants Observed in the ASCA Galactic Plane Survey