1. A magnetic resonance imaging apparatus, comprising: a measurement controller configured to control measurement of an echo signal from an imaging area containing a blood stream of an examinee on the basis of a pulse sequence containing a pre-saturation pulse for pre-saturating a desired area of an examinee and an actual imaging sequence for measuring an echo signal from the examinee; and a calculation processor configured to re-construct a blood vessel image by using the echo signal, wherein the measurement controller controls the area to be pre-saturated by the pre-saturation pulse in the imaging area in accordance with the velocity of the blood stream.