1. A magnetic resonance imaging apparatus comprising: a correction data acquisition unit configured to acquire correction use data for correcting an influence of a respiratory body motion on image data in synchronization with a signal representing the respiratory body motion, the correction use data being two-dimensional image data in an X-axis and a Y-axis direction, and the correction use data being obtained by applying both readout gradient and phase encode gradient; a data acquisition unit configured to acquire imaging data by imaging subsequently to acquiring the correction use data; and a correction unit configured to generate image data by correcting the influence of the respiratory body motion based on a position shift in each of the X-axis and Y-axis directions in the correction use data.