A magnetic resonance imaging apparatus including a data acquisition system configured to acquire a nuclear magnetic resonance signal from an imaging region by performing a scan with application of a gradient magnetic field and transmission of an RF pulse to the imaging region, the magnetic resonance imaging apparatus comprising: a charge/discharge element configured to be a part of an electric power system of the magnetic resonance imaging apparatus and be charged with external electric power; and a power control unit configured to control the electric power system in such a manner that at least one unit not part of the data acquisition system is supplied with electric power from the charge/discharge element; the apparatus further comprising, as units not part of the data acquisition system, a table driving device configured to move a table, a projector configured to irradiate light for positioning towards the table and a vacuum pumping device; wherein the data acquisition system comprises a static magnetic field magnet, a shim coil, a gradient magnetic field coil, a transmission RF coil, a reception RF coil, a static magnetic field power supply, a shim coil power supply, a gradient magnetic field power supply, a RF transmitter, a RF receiver and a system control unit; wherein the vacuum pumping device is configured to reduce noise caused by vibration of the gradient magnetic field coil by vacuumizing surrounding areas of the gradient magnetic field coil; wherein the power control unit is configured to control the electric power system in such a manner that electric power of the charge/discharge element is supplied to at least one unit of the data acquisition system, depending on power consumed in a period during which a pulse sequence is executed; and wherein the power control unit is configured to control the electric power system such that consumed power of a supply destination of the charge/discharge element is covered with the external electric power when said consumed power is not more than a predetermined value, and that electric power in excess of the predetermined value is covered with accumulated electric power of the charge/discharge element when said consumed power exceeds the predetermined value. a charge/discharge element configured to be a part of an electric power system of the magnetic resonance imaging apparatus and be charged with external electric power; and a power control unit configured to control the electric power system in such a manner that at least one unit not part of the data acquisition system is supplied with electric power from the charge/discharge element; the apparatus further comprising, as units not part of the data acquisition system, a table driving device configured to move a table, a projector configured to irradiate light for positioning towards the table and a vacuum pumping device; wherein the data acquisition system comprises a static magnetic field magnet, a shim coil, a gradient magnetic field coil, a transmission RF coil, a reception RF coil, a static magnetic field power supply, a shim coil power supply, a gradient magnetic field power supply, a RF transmitter, a RF receiver and a system control unit; wherein the vacuum pumping device is configured to reduce noise caused by vibration of the gradient magnetic field coil by vacuumizing surrounding areas of the gradient magnetic field coil; wherein the power control unit is configured to control the electric power system in such a manner that electric power of the charge/discharge element is supplied to at least one unit of the data acquisition system, depending on power consumed in a period during which a pulse sequence is executed; and wherein the power control unit is configured to control the electric power system such that consumed power of a supply destination of the charge/discharge element is covered with the external electric power when said consumed power is not more than a predetermined value, and that electric power in excess of the predetermined value is covered with accumulated electric power of the charge/discharge element when said consumed power exceeds the predetermined value.