To make a voltage drop in each internal circuit in power supply wiring uniform and to make a power supply voltage supplied to each internal circuit uniform.

In a power supply wiring structure of a semiconductor integrated circuit having power supply wiring for supplying power from the outside to each of a plurality of internal circuits formed in the semiconductor integrated circuit, the power supply wiring includes a plurality of feeding points obtained by successively branching one end of the power supply wiring, so that each of the feeding point becomes a feeding point to a load being the internal circuit. Also, the other end of the power supply wiring becomes a power receiving point of the semiconductor integrated circuit. A circuit that consumes power is not connected between the power receiving point and the feeding point.