To provide an oscillator circuit of a simple constitution, which can improve the temperature dependency of the oscillated frequency.

Inverters 1, 2, 3 are connected in series, feedback is applied from the output terminal of the inverter 3 to the input terminal of the inverter 1 via a resistor 5, and feedback is applied from the output terminal of the inverter 2 to the input terminal of the inverter 1 via a capacitor 4. A resistor 6 having a temperature coefficient greater than the temperature coefficient of the resistor 5 is placed in a feedback circuit from the output terminal of the inverter 2 to the input terminal of the inverter 1 via a capacitor 4 to adjust the charging / discharging start voltage and a charging / discharging time of the capacitor 4.