PROBLEM TO BE SOLVED: To acquire further stable analysis results of navigator data in a magnetic resonance imaging apparatus.SOLUTION: This magnetic resonance imaging apparatus executes a navigator sequence so as to acquire first navigation data by a first echo time where a phase difference corresponding to the location of a prescribed tissue, for example, the diaphragm, in a phase profile indicating a relationship between the phase of the navigator data and the location in a navigator region is relatively enlarged, and second navigator data by a second echo time where the phase difference is relatively lessened； generates a phase difference profile PPS indicating a difference between the phase profile PP1 of the first navigator data and the phase profile PP2 of the second navigator data； and detects the location of the prescribed tissue based on the phase difference profile PPS.
