PROBLEM TO BE SOLVED: To provide a superconducting magnet device capable of contributing to reduced size and reduced cost of a charged particle accelerator to be installed.SOLUTION: A superconducting magnet device 10 according to an embodiment is installed in a beam line 2 of a charged particle accelerator 1. The superconducting magnet device 10 includes: a solenoid coil 11 forming a magnetic field B1 to direct an orbit of charged particles 3 toward a direction along the beam line 2; and a plurality pairs of saddle coils 12 forming a magnetic field B2 of two or more poles. The plurality pairs of saddle coils 12 are disposed on the outer peripheral side of the solenoid coil 11.
