A magnetic resonance imaging apparatus includes a collection unit which collects a magnetic resonance signal from the subject by applying a uniform static magnetic field to a subject and also applies a radio-frequency magnetic field and a gradient magnetic field to the subject in accordance with a predetermined pulse sequence, a reconstruction unit which reconstructs an image concerning the subject based on the magnetic resonance signal collected by the collection unit, a detection unit which detects a respiration level of the subject, a control unit which controls the reconstruction unit to reconstruct the image based on the magnetic resonance signal collected by the collection unit in a state wherein a peak of the detected respiration level falls within an allowable range, and a change unit which changes the allowable range based on a change in a plurality of peak values of a plurality detected respiration levels.