To enable the control of rigid resonance accompanied by operations of a plurality of auxiliary machines 8 and 9 in a vehicle drive device in which the auxiliary machines 8 and 9 are installed.

A plurality of auxiliary machines 8 and 9 are installed at the periphery of a cylindrical support member 10 installed in a vehicle drive device and disposed separately on a plane 100 along a direction orthogonal to the central axis 110 of the cylindrical support member 10. As a result, upon operations of the plurality of auxiliary machines 8 and 9, one auxiliary machine 9 (or 8) across the other auxiliary machine 8 (or 9) through the cylindrical support member 10 starts to function as a dynamic damper.