An object of the present invention is to acquire data, which is used to construct a water component-enhanced/fat component-suppressed image, with a repetition time TR set to a desired value. Included are a data acquisition unit and an image construction unit. The data acquisition unit acquires data D_.phi.fat according to a steady-state pulse sequence specifying that the phase of an RF pulse is varied in order of 0, 1.times..phi.fat, 2.times..phi.fat, etc. Herein, .phi.fat=(2-TR/T_out+2.t- imes.m).times..pi. is established on the assumption that m denotes an integer equal to or larger than 0 and meets TR/(2.times.T_out)-1