To provide an inverter device with a lower manufacturing cost while preventing generation of heat and vibration resulting from eddy current.

An inverter device comprises: an inverter stack 10 having a caster 10a on a bottom; and a distribution panel 50 for housing the inverter stack 10 by having the inverter stack 10 enter from the front surface side. The inverter stack 10 includes: an output relay bar 73 for connecting an output terminal of the inverter stack 10 and an output relay terminal 53 constituting the distribution panel 50 and provided with an output wire 55 connected to a load; and a lower frame 20 constituting a bottom part and formed by having a plurality of frame materials 21 connected to each other as sides of a rectangular solid. In the lower frame 20, the frame materials 21 which constitute sides of a four-circumferential frame penetrated by the output relay bar 73 are formed of a nonmagnetic body.