To provide a projection television capable of continuously keeping viewing without interrupting the viewing even during convergence control and to provide a convergence control method thereof.

The projection television, which magnifies images displayed on cathode ray tubes (CRTs) for the colors red, green, and blue using lenses and projects the magnified images onto a screen, a convergence control apparatus provided with a main microcomputer that: generates a start signal for informing of first production of either of a horizontal synchronizing signal and a vertical synchronizing signal; normally projects a video signal onto the screen; generates a convergence adjustment instruction when a video signal decoder generates the start signal; completes convergence adjustment when a convergence control unit generates a completion signal; and controls displaying the received video signal, and the convergence control apparatus adjusts the convergence while the received image signal is displayed.