A sensor element comprising: a piezoelectric body comprising a frame having an x-axis direction as a longitudinal direction in an orthogonal coordinate system xyz, two driving arms which mutually extend from the frame in a y-axis direction at positions separated from each other in the x-axis direction, and a detecting arm extending from the frame in the y-axis direction between the two driving arms in the x-axis direction; a plurality of excitation electrodes which are located on the two driving arms with arrangements exciting the two driving arms in the x-axis direction; one or more first detecting electrodes and one or more second detecting electrodes which are located on the detecting arm with arrangements extracting mutually different polarity charges when the detecting arm vibrates in the x-axis direction or z-axis direction; two excitation-use terminals, a first detection-use terminal, and a second detection-use terminal; a plurality of excitation-use wiring parts which connects the plurality of excitation electrodes and the two excitation-use terminals with connection relationships where the two driving arms bend to inverse sides to each other in the x-axis direction and vibrate with inverse phases when an AC voltage is supplied to the two excitation-use terminals; a first detection-use wiring part which is connected to the one or more first detecting electrodes and the first detection-use terminal; and a second detection-use wiring part which is connected to the one or more second detecting electrodes and the second detection-use terminal, wherein the frame includes a single detecting arm, characterized in that at least a portion of the first detection-use wiring part and at least a portion of the second detection-use wiring part extend on the frame alongside each other over 1/4 or more of a length of the frame in the longitudinal direction of the frame. a piezoelectric body comprising a frame having an x-axis direction as a longitudinal direction in an orthogonal coordinate system xyz, two driving arms which mutually extend from the frame in a y-axis direction at positions separated from each other in the x-axis direction, and a detecting arm extending from the frame in the y-axis direction between the two driving arms in the x-axis direction; a frame having an x-axis direction as a longitudinal direction in an orthogonal coordinate system xyz, two driving arms which mutually extend from the frame in a y-axis direction at positions separated from each other in the x-axis direction, and a detecting arm extending from the frame in the y-axis direction between the two driving arms in the x-axis direction; a plurality of excitation electrodes which are located on the two driving arms with arrangements exciting the two driving arms in the x-axis direction; one or more first detecting electrodes and one or more second detecting electrodes which are located on the detecting arm with arrangements extracting mutually different polarity charges when the detecting arm vibrates in the x-axis direction or z-axis direction; two excitation-use terminals, a first detection-use terminal, and a second detection-use terminal; a plurality of excitation-use wiring parts which connects the plurality of excitation electrodes and the two excitation-use terminals with connection relationships where the two driving arms bend to inverse sides to each other in the x-axis direction and vibrate with inverse phases when an AC voltage is supplied to the two excitation-use terminals; a first detection-use wiring part which is connected to the one or more first detecting electrodes and the first detection-use terminal; and a second detection-use wiring part which is connected to the one or more second detecting electrodes and the second detection-use terminal, wherein the frame includes a single detecting arm, characterized in that at least a portion of the first detection-use wiring part and at least a portion of the second detection-use wiring part extend on the frame alongside each other over 1/4 or more of a length of the frame in the longitudinal direction of the frame.