1. A magnetic resonance imaging apparatus comprising: a measurement control section which controls measurement of an echo signal from a desired region of an object using a predetermined imaging sequence; and an image reconstruction section which reconstructs an image using the echo signal, wherein the imaging sequence is obtained by combining a first sequence portion for measuring a first echo signal used for acquisition of the image with a second sequence portion for measuring a second echo signal used for acquisition of blood flow information of the object, and a blood flow information acquisition section which acquires the blood flow information using the second echo signal and an artery and vein separation section which extracts at least one of an artery and a vein in the image, which is reconstructed using the first echo signal, using the blood flow information are provided.