A semiconductor integrated circuit for radio communication includes a receiving-system high frequency block including a group of circuits for processing a received high frequency signal, a receiving-system voice band block including a group of circuits for processing a received voice band signal, a transmitting-system voice band block including a group of circuits for processing a transmission voice band signal, a transmitting-system high frequency block including a group of circuits for processing a transmission high frequency signal, and a power source control circuit for performing power source control to operate/stop each of the groups of circuits based on a power source control signal. The power source control circuit performs individual power source control for at least one circuit of the multiplier, the noise detector, the voice signal power amplifier, and the voice signal level detector, and also performs the power source control for each of the receiving-system high frequency block, the receiving-system voice band block, the transmitting-system voice band block, and the transmitting-system high frequency block, except for the at least one circuit subjected to the individual power source control. Current consumption is reduced depending on the operating state and a deterioration of the rising characteristics of power source is suppressed.