PURPOSE: To ensure stationary condition of a spin system in a data collection term synchronous with respiration by performing a data collection in an exhaling term avoiding the data collection with an inhaling term to match the respiration of testee to be inspected, and running a sequence with the application of an inclined magnetic field omitted in the inhaling term.

CONSTITUTION: A respiration synchronous system is provided in which a respiration synchronous controller 14 is connected to an air bag 12 mounted on the belly part of testee P to be ispected through an air tube 13 and a data of a breathing action of the testee P measured is applied to a computer system 1. Moreover, the computer system 1 itself has a function which performs a data collection in an exhaling term avoiding the data collection in an inhaling terms and a function which applies a control signal to a sequencer 2 to the effect that a sequence is run with the application of an inclined magnetic field omitted in the inhaling term.