A gradient magnetic field coil device (4) is provided with a plurality of main coils (M1-M4) which each create a magnetic field distribution having linearly inclined strength in an image capture area of a magnetic resonance imaging apparatus, and a plurality of shield coils (S1-S4) which are disposed on the opposite side from the image capture area with the main coils (M1-M4) therebetween and suppress a leakage magnetic field created on the opposite side by the main coils (M1-M4). The plurality of main coils (M1-M4) and the plurality of shield coils (S1-S4) are connected in series. The gradient magnetic field coil device also comprises a plurality of current adjusters (5) which are respectively connected in parallel with the plurality of shield coils (S1-S4) and individually adjust electric currents (Is1-Is4) flowing through the shield coils (S1-S4) to thereby improve the symmetry of the leakage magnetic field. Consequently, the gradient magnetic field coil device (4) capable of suppressing the occurrence of an eddy current magnetic field even if there is a relative positional displacement between the main coils (M1-M4) and the shield coils (S1-S4) can be provided.