A phase synchronization circuit includes a controlled oscillator configured to generate a first oscillation signal and a second oscillation signal that have a common frequency but different phase controlled by a combination of a first control signal and a second control signal, a digital phase frequency detector configured to detect a frequency difference and a first phase difference between a reference signal and the first oscillation signal to generate the first control signal, an analog phase detector configured to detect a second phase difference between the second oscillation signal and the reference signal to generate the second control signal, and a lock detection unit configured to detect a lock of the first oscillation signal with the reference signal in terms of frequency and phase, in order to set the analog phase detector in an active state.