A semiconductor integrated circuit such that deterioration in clock phase precision due to the unevenness of the stray capacitance of a multiphase clock signal line and an increase in substrate area are suppressed when the multiphase clock signal line is led from a ring oscillation circuit capable oscillating at a high frequency. This semiconductor integrated circuit includes N stages of amplifier circuits connected in a ring shape, oscillating and arranged separately in a plurality of columns on a semiconductor substrate. The amplifier circuit at the m-1-th stage and the amplifier circuit at the m-th state are not adjacent to each other in each column where m is an arbitrary integer from 2 to N. A plurality of lines for extracting a plurality of output signals from the amplifier circuits of one of the columns are provided.