The invention relates to an MR apparatus (1) having an examination volume (6) of the open type such that the examination volume (6) is also accessible laterally, having main coil devices (2) for producing a main magnetic field that are disposed on two opposite sides of the examination volume (6), having at least one high-frequency coil device (5) for exciting the proton precession and having at least one two-part gradient coil device (4), disposed on opposite sides of the examination volume (6), for the positional coding of the excitation of the proton precession. The dynamic Lorentz forces have hitherto resulted in a high oscillation level. It is an object of the invention to provide an MR apparatus (1) that has only a low oscillation level. The invention proposes that, on at least one side of the examination volume (6), a central recess (7) extends from the examination volume (6) and through the main coil device (2), in which recess (7) a holding element (9) is disposed to whose side facing the examination volume (6) the gradient coil device (4) is exclusively attached.