A voltage controlled oscillator of the present invention comprises a reference voltage generation section 114 for generating a plurality of reference voltage based on a power supply voltage. A first to a third reference voltages Vref1, Vref2, and Vref3 are inputted to a first to a third variable capacitance circuits A, B, and C, respectively, at each one of terminals of each of the first to the third variable capacitance circuits A, B, and C. The first to the third reference voltages Vref1, Vref2, and Vref3 each has a fixed value, and a difference between the first reference voltage Vref1 and the second reference voltage Vref2 and a difference between the second reference voltage Vref2 and the third reference voltage Vref3 represent values different from each other. A control voltage Vt for feedback-controlling an oscillation frequency is inputted to each of the other of the terminals of the variable capacitance element of each of the n variable capacitance circuits such that the control voltage Vt having the same value is inputted to said each of the other of the terminals.