The present invention relates to a medical arm sling wearable on shoulders for hanging and supporting arms, comprising: a shoulder supporting member which is curvedly formed to be worn on both shoulders a hanger member which is disposed on a front side of the shoulder supporting member and capable of vertically controlling the length of arms an arm supporting member which is detachably coupled to the hanger member and selectively supports a part from a wrist to an elbow a waist belt which is connected to a lower part of the shoulder supporting member, respectively, and worn around a waist and a fastener which is for connecting the arm supporting member to the hanger member or separating the arm supporting member from the hanger member. Thus, by using the arm supporting member as a length controller of the hanger member, the length of a connection band is controlled, thereby providing a convenience to change the position and a posture of an arm wearing a cast depending on the degree of symptom of a fracture patient. Also, the arm supporting member can be assembled or separated, if necessary, when a patient wears a cast in daily life, and the position of the arm supporting member can be secured not to be moved through a movement prevention member when the patient has a serious symptom such that a pain caused by a movement can be alleviated and a fractured part can be cured in a short time. In addition, a backpack main body or a baby sling main body can be connected to be worn together with the arm sling in a state of wearing the arm supporting member as a shoulder type, and the backpack main body or the baby sling main body can be used alone by being separated from the arm sling in a state of wearing an arm hanger.COPYRIGHT KIPO 2015본 발명 어깨 착용식 의료용 팔걸이은 팔을 걸어서 지지하는 의료용 팔걸이에 있어서, 양쪽 어깨에 착용 가능하게 만곡지게 이루어지는 견착부재 상기 견착부재 전방에 구비되어 팔 위치를 상,하로 조절하도록 길이 조절되는 행거부재 상기 행거부재와 착탈 가능하게 결합되어 손목부터 팔꿈치 부위를 선택적으로 받쳐주는 팔받침부재 상기 견착부재 하부에 각각 연결되어 허리 부위에 착용되는 허리벨트 및 상기 팔받침부재를 상기 행거부재에 연결 또
