Door armrest structure of vehicle

A door armrest structure of a vehicle as a door armrest structure provided to a door internal panel configuring a door for opening/closing a door opening formed in a vehicle body and a door trim covering the door internal panel, the door armrest structure comprising:

• an armrest pivot rotatably coupled to the door internal panel and extending in a direction parallel to the door internal panel;
• a trim cover including a first end portion connected to the armrest pivot and operating to be rotated around the armrest pivot according to rotation of the armrest pivot;
• an armrest including an end portion attached to the trim cover and operating to deploy and return according to operation of the trim cover;
• a drive motor operating to rotate the armrest pivot according to an opening signal or a closing signal of the door;
• and
• a telescoping rod including a first end portion connected to the drive motor and a second end portion passing through the armrest to be fixed to a second end portion of the trim cover, and moving back and forth to pivot the trim cover according to operation of the drive motor.