Drive device and boot

A drive device for opening and closing an opening/closing body that is supported by a vehicle body in an openable and closable manner, the drive device comprising:

• a drive device main body connected to the vehicle body and the opening/closing body, the drive device main body including a telescopic part;
• and
• a boot through which a wire extending from the drive device main body passes, wherein
• the boot includes
• a boot main body configured to be attachable to the vehicle body, and
• a fitting part configured to be fittable to a fitted part of the drive device main body, the fitting part being disposed at an end of the boot main body, and
• the fitting part includes a contact part that is opposite to an end surface of the drive device main body, wherein a gap is provided between the contact part and the end surface of the drive device main body, and the gap has a size such that the contact part is able to come into contact with the end surface of the drive device main body when the fitting part rotates relative to the drive device main body, and
• the fitting part is rotatable relative to the drive device main body when the gap still exists between the contact part and the end surface of the drive device main body and the contact part is not in contact with the drive device main body, and
• the rotation of the fitting part relative to the drive device main body is restricted when the gap no longer exists between the contact part and the end surface of the drive device main body and the contact part is in contact with the end surface of the drive device main body.