An MR data acquisition method for acquiring data D_.phi.fat according to a steady-state pulse sequence specifying that a phase of an RF pulse is varied in order of 0, 1.times..phi.fat, 2.times..phi.fat, etc., wherein .phi.fat=(2-TR/T_out+2.times.m).times..pi. is established on an assumption that m denotes an integer equal to or larger than 0 and meets TR/(2.times.T_out)-1