This paper presents the design and modeling results of an upper extre-mity exoskeleton mounted on a wheel chair. This new device is dedicated to regular and efficient rehabili-tation training for weak and injured people without the continuous presence of a therapist. The exoske-leton being a wearable robotic device attached to the human arm, the user provides information signals to the controller in order to generate the appropriate control signals for different training strategies and paradigms. This upper extremity exoskeleton covers four basic degrees of freedom of the shoulder and the elbow joints with three additional adaptability degrees of freedom in order to match the arm anatomy of different users.

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