Apparatus for supporting a muscular strength of arm

The present invention relates to an upper extremity muscle strength assisting device for assisting rehabilitation or the elderly senior upper extremity strength strengthening exercise, and more particularly, to an upper extremity muscle assisting device operable by adjusting the impedance according to the user's intention of operation. Upper limb muscle strength assistance apparatus according to an embodiment of the present invention, the biological signal measuring electrode for measuring the EMG signal of the upper extremity muscle of the user; A biosignal processor configured to analyze an operation intention timing of a user based on an EMG signal measured by the biosignal measuring electrode; A connection link having an upper limb contact that the upper limb of the user contacts; A force sensor attached to the connection link to sense a force of the upper limb; An operation signal processor for integrating information analyzed by the biosignal processor and information sensed by the force sensor to generate a signal for controlling a movement and rotation angle of the connection link unit; And a motor driven by receiving the signal generated by the operation signal processor and connected to the connection link unit.