Abstract: An angular rate detector is disclosed having a first and a second detecting electrode 6a, 7a, which detect a second oscillation produced by Coriolis force, and disposed at locations which are symmetrical with respect to a direction of excitation D2 of a piezoelectric oscillator 2 and which corresponds to nodes of a first oscillation produced by the excitation. When the piezoelectric oscillator 2 rotates in a certain direction, a first signal appearing at the first detecting electrode 6a will be lagging in phase while a second signal appearing at the second detecting electrode 7a will be leading in phase. An electrical circuit produces an angular rate signal which represents a phase difference between the first and the second signal.