A vibration detector is provided with a heating member for generating heat through deformation, friction, or both caused by external vibration and a detection element for detecting the heat flux from the heating member and is configured so that information about vibration is detected on the basis of the detection results of the detection element. Additionally, a detection element is used that has a structure in which a plurality of first and second vias (101, 102) are formed that penetrate, in the thickness direction, an insulating base material (100) comprising a thermoplastic resin; first and second interlayer connection members (130, 140) that are formed from different metals are embedded in the first and second vias (101, 102); and the first and second interlayer connection members(130, 140) are alternately connected in series and in which the metals from which the first and second interlayer connection members are formed are sintered alloys that are sintered in a state in which the crystal structures of a plurality of metal atoms are maintained.