A semiconductor device includes: a first substrate; a multilayer wiring layer formed on the first substrate; a first inductor formed into a meander shape on the multilayer wiring layer in a plan view; and a second inductor formed into a meander shape on the multilayer wiring layer in a plain view, and arranged so as to be close to the first inductor in a plan view and not to overlap with the first inductor. A transformer is configured by the first inductor and the second inductor and, in a plan view, the first inductor and the second inductor extend along a first direction in which one side of the first substrate extends.