An apparatus for switching a video signal comprises a switch for switching a video signal from one to another, a memory for storing an output of the switch, a detector for detecting a switch signal, a switch control circuit for controlling the switch in response to the switch signal, and a memory control circuit for controlling writing and reading of the memory, wherein when the switch signal is detected, the memory control circuit continues to write one video signal until a sync. (synchronizing) signal of the one video signal is detected and after a predetermined period write another video signal when a sync. signal of the other video signal is detected.