Power transmission device

A power transmission device, comprising:

• a power transmission mechanism having a plurality of rotating elements;
• a case that houses the power transmission mechanism;
• a sensor disposed at a bottom of the case;
• and
• an electrical wire that electrically connects the sensor and a connector section, wherein
• the case has a first chamber that houses the power transmission mechanism and that is defined by a circumferential wall, and a second chamber that houses a control valve of the power transmission mechanism,
• the first chamber and the second chamber are adjacent to each other in a vehicle front-rear direction,
• the circumferential wall has a housing section on a second chamber side in the vehicle front-rear direction that houses one of the plurality of rotating elements,
• the electrical wire is supported by a cover member that seals an opening of the housing section,
• the sensor is disposed in a bottom section of the first chamber,
• the connector section is disposed in a top section of the second chamber,
• the electrical wire is routed to pass between the first chamber and the second chamber, and
• as viewed from a direction of an axis of rotation of the power transmission mechanism, the electrical wire is routed from the bottom section of the first chamber to the top section of the second chamber to pass between the plurality of rotating elements in a region opposite the second chamber relative to one of the plurality of rotating elements.