To provide a variable capacitance thin film capacitor with a small capacitance change by a high frequency signal and a large capacitance change by a DC bias, and to provide a high frequency component utilizing the variable capacitance thin film capacitor.

In the variable capacitance capacitor comprising first to third variable capacitive elements C1 to C3 whose capacitance varies with an applied voltage sequentially connected in series between an input terminal I and an output terminal O, a first connection electrode 3a and a second connection electrode 3b are placed between an input electrode 4a and an output electrode 4b in a direction orthogonal to the arranged direction of the input and output electrodes 4a, 4b.