An arm-held umbrella includes an umbrella and an arm connector. One end of a supporting rod of the umbrella is mechanically connected with the arm connector so that the umbrella can rotate at a certain included angle relative to the length direction of the arm; the arm connector can be wrapped and fixed on the arm, and can also be used as a handle for holding umbrella by hand. Exactly, the umbrella attachable to the arm is “a multipurpose umbrella”, which can not only be attached to arm but also be held by hand. Especially, holding the umbrella under the state of bent arm meets various demands of people, for example, playing a mobile phone with both hands, cycling or taking photos while holding the umbrella.