To simplify the fitting of a drive train in a vehicle by providing a pivot support at one end section of a punched main body, and providing a bolt fastening nut at the other end section to form an adapter plate used for supporting the drive train on a vehicle frame via a mount.

A hydraulic separation mount 14 arranged between a drive train, i.e., a transmission housing 12, and a vehicle frame 16 is fitted to the transmission housing 12 via an adapter plate 10. The adapter plate 10 includes a main body 18 having a central offset section 20 reinforced by a pair of blanked gussets 22, and a nut 25 is welded at a proper position of the main body 18 to accept a fixing bolt 23. A pivot support 26 is formed with a pair of pivot flanges 28 at the end section on the opposite side to the nut 25, and one end of the mount 14 is pivotally fitted to the pivot support 26.