A synchronizing signal regenerator for regenerating all the required synchronizing signals from a composite signal having a plurality of synchronizing signals having a different repetition period and phase. The composite signal comprises a video signal and a pulse code modulated audio multiplex signal arranged in a predetermined sequence. The composite signal further comprises a first synchronizing signal consisting of a certain predetermined pulse series synchronized with a modulated pulse series of the audio multiplex signal and a second pulse code modulated synchronizing signal including a plurality of other synchronizing signals required for the reproduction of the video signal and the audio multiplex signal. The synchronizing signals are inserted at a certain predetermined portion in the video signal and in the audio multiplex signal.The synchronizing signal regenerator comprises means for reproducing the first synchronizing signal after detecting the insertion position of the first synchronizing signal, a means for reproducing a predetermined part of a synchronizing signal among the second synchronizing signals using the first synchronizing signal as the reference, a means for frequency dividing at least one of the reproduced parts of the second synchronizing signal, and means for synchronizing the frequency divided signal by using the parts of the second synchronizing signal having the same phase as the other second synchronizing signals to be reproduced among said part of the second synchronizing signals.