static magnetic field generation means for generating a static magnetic field in an imaging space where a subject is placed;

gradient magnetic field generation means for applying a gradient magnetic field in said imaging space;

high frequency magnetic field generation means for irradiating a high frequency magnetic field in said imaging space;

reception means for detecting nuclear magnetic resonance signals generated from the subject;

image reconstruction means for reconstructing images by using the nuclear magnetic resonance signals detected by the reception means;

first control means for controlling the gradient magnetic field generation means and the high frequency magnetic field, in accordance with a pulse sequence;

calculation means for calculating an intensity of a residual magnetic field generated by application of the gradient magnetic field on a basis of a residual magnetic field response function, which represents a relation between a strength of the applied gradient magnetic field and a strength of the residual magnetic field being generated by the application of the gradient magnetic field;

correction means for correcting the residual magnetic field, based on the intensity calculated by the calculation means; and

updating means for updating the residual magnetic field response function upon every application of the gradient magnetic field pulse,

wherein the calculation means calculates the intensity of the residual magnetic field by using the residual magnetic field function updated upon said every application of the gradient magnetic field pulse, and

the correction means corrects the residual magnetic field upon every application of the gradient magnetic field pulse.