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We present a detailed examination of strongly blueshifted emission linesobserved with the EUV Imaging Spectrometer on board the {\it Hinode} satellite.We found two kinds of blueshifted phenomenon associated with the X3.4 flarethat occurred on 2006 December 13. One was related to a plasmoid ejection seenin soft X-rays. It was very bright in all the lines used for the observations.The other was associated with the faint arc-shaped ejection seen in softX-rays. The soft X-ray ejection is thought to be an MHD fast-mode shock wave.This is therefore the first spectroscopic observation of an MHD fast-mode shockwave associated with a flare.

Strongly Blueshifted Phenomena Observed with {\it Hinode}/EIS in the 2006 December 13 Solar Flare