Disclosed is a technique which allows easy optimization of imaging conditions in imaging using two-dimensional excitation as a pre-pulse. To this end, a parameter which specifies the excitation region of the two-dimensional excitation is shifted, a value (optimum value) when a predefined index is ideal for each application to be applied is decided in a subsequent main imaging sequence, and the optimum value is set to the value of the parameter, whereby optimization is performed. A two-dimensional excitation pre-pulse which is excited under optimum excitation conditions is used to optimize the parameter in the main imaging sequence.