Vehicle-mounted holder

Disclosed is a vehicle-mounted holder, applied to a vehicle. The vehicle-mounted holder includes: a first fixing member, an adjusting arm and a second fixing member. The first fixing member includes a positioning column inserted in the inserting hole. One end of the adjusting arm is connected to the first fixing member, and the adjusting arm is provided with an adjustable joint; and the second fixing member is configured to install user's mobile device and connected to a free end of the adjusting arm.