Abstract: The equipment in this invention provides an ultrasound diagnostic equipment with a matrix switch checking means configured in a combined use with means commonly furnished to said device heaving a built-in test sequencer, whereby taps on the delay line is selected in due order from one end of said taps for each channel of the matrix switch to input a checking signal to that channel from a transducer circuit every time these taps are selected; as a result a signal obtained from the delay-line output terminals is shown on a display screen of a display device as a mimic echo signal to determine the presence or absence of any fault of switching elements in the relevant channel of the matrix switch based on a mimic echo image pattern shown on the display screen.