Each output from an angular-velocity detecting element (2) and first and second signal processing sections (21, 22) is supplied to each input terminal of a switch circuit (7) having input terminals of a number corresponding to the number of the outputs, and an output terminal of the switch circuit (7) is connected to an output terminal (4). The connection state of the switch circuit (7) is switched, corresponding to a mode signal outputted from a mode-signal generation circuit (8), one output is selected out of the outputs from the angular-velocity detecting element 2 and the first and the second signal processing sections (21, 22), and the selected output is supplied to the output terminal (4).