Power transmission apparatus

A power transmission apparatus, the power transmission apparatus configured for use in a vehicle and configured to be mounted on a vehicle member via a mount, the power transmission apparatus comprising:

• a case;
• and
• a motor inside the case;
• wherein
• the case includes a mount fastening portion for fastening the mount with a plurality of bolts;
• the mount fastening portion has a plurality of bolt tightening holes, the plurality of bolt tightening holes being configured so that the plurality of bolts are tightened into the plurality of bolt tightening holes, the bolt tightening holes having axial directions parallel to each other;
• a recess that is recessed from outside of the case toward inside the case in a region connecting two adjacent bolt tightening holes when the mount fastening portion is viewed in the axial directions of the plurality of bolt tightening holes;
• when the mount fastening portion is viewed in the axial directions of the plurality of bolt tightening holes, a space is formed by the recess such that the recess overlaps the region connecting the two adjacent bolt tightening holes;
• and
• the space is open to the outside of the case when the space is viewed from the outside of the case in a direction perpendicular to a wall of the case.