To secure sufficient positional accuracy when each attaching member is attached by accurately positioning one attaching member to a vibration source and the other attaching member to a supporting member in a vibration isolation mount for vibration isolation support the vibration source such as a stepping motor or the like by attaching a pair of attaching members disposed by holding an elastic material between to a vibration source side.

A positioning fitting part 11 fitted in a fitting part 10 provided in a vibration source 4 for positioning one attaching member 2 to the vibration source 4 is provided in one attaching member 2 and, in the other attaching member 3, a positioning fitting part 17 fitted in a fitting part 16 provided in a supporting member 5 for positioning the other attaching member 3 to the supporting member 5 is provided.