Abstract: A portable arm support (10) for attaching to a user to support or steady firearms, cameras, binoculars, or the like. The portable arm support (10) includes a saddle (12) having fastening straps (20) which secure the saddle (12) to the forearm of the user, and a belt pocket (42) which is mounted to the belt of a user. A support tube (14) is pivotally secured to the saddle (12) and is telescopically extensible for adjusting an overall length of the support tube (14) to extend from the saddle (12) and into the belt pocket (42). The support tube (14) is telescopically adjustable to extend and then latch in an extended position with the lower end of the support tube (14) disposed within the cavity (60) of the belt pocket (42) to support the saddle (14) in fixed relation to the belt pocket (42).