An arm sling apparatus includes cooperating suspension system and support frame wherein the weight of a user's arm may be transferred from the shoulder to the torso. The arm sling apparatus allows the shoulder to rest and/or heal by temporarily relieving the shoulder of its lifting duties preferably without touching and therefore without stressing or fatiguing the neck or shoulder regions. A suspension system comprising one or more of suspending devices engages and supports the arm in conjunction with a rigid, stable support frame from which it is hung. The support frame preferably comprises a stiff, but comfortable, waist belt and a rigid upright support arm adapted to accept the weight applied to the suspension system and center this weight about the hips. The support frame provides sufficient clearance for the shoulder and neck regions so that pressure is not applied to these areas. Immobilization straps or other devices may be adjusted to permit varying degrees of activity or immobilization so that the shoulder corresponding to the suspended arm may rest and/or heal. The device may also be used to prevent repetitive wear injuries if a user finds him or herself performing the same motion repeatedly.