A semiconductor device includes: an MMIC having a DC pad; a bias substrate; a plurality of MIM capacitors mounted on the bias substrate; a plurality of pads provided on the bias substrate and respectively connected to overlying electrodes of the MIM capacitors; and a wire connecting the DC pad to any one of the plurality of pads, wherein the plurality of pads are arranged between the DC pad and the plurality of MIM capacitors in a planar view, and extend parallel to a row of the plurality of MIM capacitors laterally arranged side by side.