An arm support device for improving body posture when viewing an object such as when using a smartphone or reading a book. The arm support device generally includes includes a strap which is connected at its first end to the first end of a retainer and at its second end to the second end of the retainer. When so assembled, the strap and retainer form a looped configuration which may be worn around the body of a user. The strap extends around the shoulder and body of the user, with the retainer being positioned to removably and comfortably receive the elbow of the user. By using the arm support device, a user may retain optimal posture to view an object without excess strain on the neck.
